IllustrationCRUISE CONTROL WILL NOT TURN ON, CANNOT OPERATE WHILE CAR IS IN MOTION ON THE HIGHWAY. 12
2004 Lexus RX330
Owner reports · Recalls · Investigations
More warning signs than most RX330 years
Owner complaints for the 2004 Lexus RX330 are substantially higher than the model-year median of 36.
About this comparison →How this year compares
Owner complaints by model year
Compare all RX330 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
810–25K
2525–50K
2450–75K
2275–100K
26100–150K
10150K+
188 reports with mileage · 99 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Power Train. Review the 69 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes, Hydraulic. Review the 58 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Structure. Review the 34 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
37 crash reports1 fire reports20 injury reports
Vehicle Speed Control complaints
34 reportsMY 2004 LEXUS RX330 WAS STOPPED IN A PARKING LOT WITH MY FOOT ON THE BRAKE ABOUT TO GET READY TO LET A PASSENGER LEAVE THE VEHICLE. THE CAR WAS STATIONARY AND NOT MOVING. WHEN SUDDENLY THE CAR ACCELERATED TO FULL THROTTLE. WITHIN SECONDS THE CAR TOOK OFF AND JUMPED A CURB AND DROVE AT FULL THROTTLE. AS SOON AS I REALIZED WHAT…
Read full complaint
MY 2004 LEXUS RX330 WAS STOPPED IN A PARKING LOT WITH MY FOOT ON THE BRAKE ABOUT TO GET READY TO LET A PASSENGER LEAVE THE VEHICLE. THE CAR WAS STATIONARY AND NOT MOVING. WHEN SUDDENLY THE CAR ACCELERATED TO FULL THROTTLE. WITHIN SECONDS THE CAR TOOK OFF AND JUMPED A CURB AND DROVE AT FULL THROTTLE. AS SOON AS I REALIZED WHAT WAS HAPPENING, I THEN PRESSED HARD ON THE BRAKE AND WAS FINALLY ABLE TO STOP THE CAR AFTER IT DROVE ABOUT 50 FT. I WAS IN SHOCK THAT THIS OCCURRED. MY HEAD HAD FLUNG BACK ALONG WITH MY PASSENGER WITH TERRIFIC FORCE. ONCE STOPPED AND I WAS COMPOSED, I DROVE THE CAR OFF THE GRASSY AREA IT WAS NOW ON AND RELUCTANTLY DROVE IT HOME. SOME DEGREE OF NECK PAIN LATER WAS NOTICED. THERE WAS NO FLOOR MAT ISSUE OR ANY NOTICEABLE OBSTRUCTIONS TO THE ACCELERATOR PEDAL. LATER UPON INSPECTION OF THE CAR THERE APPEARED TO BE SOME BODY DAMAGE TO THE CAR. NOT SURE WHERE IT CAME FROM OR IF WE HIT ANYTHING OTHER THEN THE CURB THOUGH. THE CAR ACTED AS THOUGH IT WAS POSSESSED. NEEDLESS TO SAY, I WILL BE LOOKING FOR ANOTHER CAR WITHOUT DRIVE BY WIRE IF THEY STILL EXIST.
TL* THE CONTACT OWNS A 2004 LEXUS RX330. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBERS: 11V112000 (VEHICLE SPEED CONTROL) AND 10V499000 (SERVICE BRAKES, HYDRAULIC). THE DEALER INDICATED THAT THE REPAIRS WOULD BE COMPLETED WITHIN 4 TO 6 WEEKS. THE CONTACT CALLED FOR AN EXTENDED PERIOD OF TIME AND RECEIVED NO FOLLOW …
Read full complaint
TL* THE CONTACT OWNS A 2004 LEXUS RX330. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBERS: 11V112000 (VEHICLE SPEED CONTROL) AND 10V499000 (SERVICE BRAKES, HYDRAULIC). THE DEALER INDICATED THAT THE REPAIRS WOULD BE COMPLETED WITHIN 4 TO 6 WEEKS. THE CONTACT CALLED FOR AN EXTENDED PERIOD OF TIME AND RECEIVED NO FOLLOW UP RESPONSE FROM THE DEALER. MONTHS LATER, THE DEALER INDICATED THAT THE PARTS WERE NOT AVAILABLE FOR THE RECALL REPAIRS. THE CONTACT WAS UNABLE TO DETERMINE WHEN THE VEHICLE WOULD RECEIVE THE REPAIRS. THE MANUFACTURER WAS NOTIFIED. THE CONTACT HAD NOT EXPERIENCED A FAILURE. PARTS DISTRIBUTION DISCONNECT.
TL* THE CONTACT OWNS A 2004 LEXUS RX330. WHILE BACKING UP THE VEHICLE IN THE DRIVEWAY AT A LOW RATE OF SPEED, THE VEHICLE SUDDENLY EXPERIENCED UNINTENDED ACCELERATION AND CRASHED INTO THE GARAGE AND HOUSE. THERE WERE NO INJURIES AND A POLICE REPORT WAS NOT FILED. DURING THE INCIDENT, THE VEHICLE FAILED TO IMMEDIATELY STOP WHILE …
Read full complaint
TL* THE CONTACT OWNS A 2004 LEXUS RX330. WHILE BACKING UP THE VEHICLE IN THE DRIVEWAY AT A LOW RATE OF SPEED, THE VEHICLE SUDDENLY EXPERIENCED UNINTENDED ACCELERATION AND CRASHED INTO THE GARAGE AND HOUSE. THERE WERE NO INJURIES AND A POLICE REPORT WAS NOT FILED. DURING THE INCIDENT, THE VEHICLE FAILED TO IMMEDIATELY STOP WHILE DEPRESSING THE BRAKE PEDAL. THE CAUSE OF THE FAILURE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS 119,000.
TL* THE CONTACT OWNS A 2004 LEXUS RX330. WHILE DRIVING APPROXIMATELY 2 MPH, THE VEHICLE INDEPENDENTLY ACCELERATED. AS A RESULT, THE CONTACT CRASHED INTO TWO OTHER VEHICLES AND A CURB. THE TWO PASSENGERS IN THE OTHER VEHICLES SUSTAINED INJURIES THAT REQUIRED MEDICAL ATTENTION. A POLICE REPORT WAS FILED. THE VEHICLE WAS TAKEN TO A…
Read full complaint
TL* THE CONTACT OWNS A 2004 LEXUS RX330. WHILE DRIVING APPROXIMATELY 2 MPH, THE VEHICLE INDEPENDENTLY ACCELERATED. AS A RESULT, THE CONTACT CRASHED INTO TWO OTHER VEHICLES AND A CURB. THE TWO PASSENGERS IN THE OTHER VEHICLES SUSTAINED INJURIES THAT REQUIRED MEDICAL ATTENTION. A POLICE REPORT WAS FILED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC FOR BODY REPAIRS. THE VEHICLE WAS NOT DIAGNOSED FOR THE FAILURE. THE FAILURE RECURRED. THE VEHICLE WAS TAKEN TO A DEALER FOR DIAGNOSTIC TESTING. THE FAILURE WAS UNABLE TO BE DUPLICATED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 60,000.
I GOT IN THE CAR AT 2 P.M. AFTER DRIVING 1/4 MILE IT WOULD NOT TAKE OFF FROM THE STOP SIGN IT STALLED AND LUNGED FORWARD DUE TO LOSS OF CONNECTION WHEN STEPPING ON THE GAS PEDAL. I DEPRESSED THE BRAKE AND SHIFTED FROM D TO 4 AND IT BEGAN TO SHAKE IN THE FRONT OF THE BUMPER. I PULLED OVER, PUT IT IN NEUTRAL WITH THE PARKING BR…
Read full complaint
I GOT IN THE CAR AT 2 P.M. AFTER DRIVING 1/4 MILE IT WOULD NOT TAKE OFF FROM THE STOP SIGN IT STALLED AND LUNGED FORWARD DUE TO LOSS OF CONNECTION WHEN STEPPING ON THE GAS PEDAL. I DEPRESSED THE BRAKE AND SHIFTED FROM D TO 4 AND IT BEGAN TO SHAKE IN THE FRONT OF THE BUMPER. I PULLED OVER, PUT IT IN NEUTRAL WITH THE PARKING BRAKE ON AND MY EMERGENCY FLASHERS ON, AND OPENED THE HOOD. IT STOPPED SHAKING AND I REMOVED THE FLOOR MAT, WHICH IS ATTACHED WITH CLIPS AND WITH MY HAND, I PUSHED THE GAS PEDAL. IT HAD NO REV IN THE ENGINE, AS I WOULD EXPECT. I GOT BACK IN THE CAR AND SHIFTED TO R AND THEN WITH THE BRAKE OFF, I SHIFTED TO 4. THE CHECK ENGINE LIGHT WAS FLASHING AND VSC LIGHT AS WELL. I CAN TELL YOU FOR CERTAIN MY CAR WAS NOT OVERHEATING WHEN I TOOK IT TO SEARS AUTO CENTER WITH WARNING LIGHTS VSC AND CHECK ENGINE COMING ON INTERMITTENTLY. IF THE VEHICLE OVERHEATING WAS THE CAUSE OF THE DAMAGE THE TEMPERATURE GAUGE ON THE DASH WOULD HAVE INDICATED THAT WHEN I BROUGHT IT TO SEARS. MIKE, SERVICE ADVISOR AT LEXUS OF ROSEVILLE STATED IN AN E-MAIL TO ME THAT HIS TECHNICIAN 'FOUND # 5 CYLINDER INTAKE VALVES BENT AND STUCK. #1 CYLINDER INTAKE VALVE STICKING (WILL STAY OPEN TILL PISTON HITS AND CLOSES IT). SUSPECT VEHICLE OVERHEATED CAUSING VALVE TO STICK IN GUIDES.MY CAR WAS NOT OVERHEATING AND I THINK THE ENGINE IS DEFECTIVE. I HAD A LKQ ENGINE INSTALLED AMD IT WAS FINE FOR A MONTH BEFORE IT STARTED SOUNDING LIKE MARBLES. I THINK MY CAR IS DAMAGED DUE TO A DEFECT. I HAD JUST HAD A FUL SYNTHETIC OIL CHANGE TWO WEEKS BEFORE THIS INCIDENT OCCURRED AND PUT FOUR BRAND NEW TIRES AS WELL. I BOUGHT THE CAR WITH ONLY 101K MILES FOR $23,000 IN AUGUST 2013 AND I STILL OWE $5,000 ON MY LOAN. MY CAR HAD ALL THE SERVICE RECORDS FROM LEXUS OF ROCKVILLE, PROVING THIS CAR WAS WELL MAINTAINED BY BOTH MYSELF AND THE PREVIOUS OWNER. *TR
I WAS ON THE FEEDER OF THE FREEWAY AND WAS GETTING READY TO ENTER THE FREEWAY ENTRANCE RAMP. I PUSHED ON THE GAS PEDAL TO ACCELERATE, AT THIS TIME THE CAR SPED UP ON ITS OWN BEYOND THE SPEED THAT I WAS ATTEMPTING TO GO. I REMOVED MY FOOT FROM THE PEDAL; HOWEVER THE CAR KEPT ACCELERATING. I PUSHED ON THE BRAKES AND THE CAR KEPT A…
Read full complaint
I WAS ON THE FEEDER OF THE FREEWAY AND WAS GETTING READY TO ENTER THE FREEWAY ENTRANCE RAMP. I PUSHED ON THE GAS PEDAL TO ACCELERATE, AT THIS TIME THE CAR SPED UP ON ITS OWN BEYOND THE SPEED THAT I WAS ATTEMPTING TO GO. I REMOVED MY FOOT FROM THE PEDAL; HOWEVER THE CAR KEPT ACCELERATING. I PUSHED ON THE BRAKES AND THE CAR KEPT ACCELERATING. I HAD HEARD ABOUT THE FLOOR MAT CAUSING THIS PROBLEM; SO I CHECKED THE GAS PEDAL AND THERE WAS NOTHING NEAR PEDAL. THE FLOOR MAT HAD NOT MOVED EVERYTHING WAS IN PLACE. I PUT MY FOOT UNDER THE GAS PEDAL AND ATTEMPTED TO RAISE THE PEDAL; THIS HAD NO EFFECT ON THE SPEED. I STOMPED ON THE GAS PEDAL A COUPLE OF TIMES AND THE PEDAL THEN STARTED RESPONDING NORMALLY. I TRIED TO RECREATE THE PROBLEM SEVERAL TIMES WITH NO RESPONSE. *TR
2004 LEXUS RX330. CONSUMER WRITES IN REGARDS TO VEHICLE CRASH AND RECALL NOTICE CONCERNING FLOOR CARPET COVER AND RETENTION CLIPS *TGW THE CONSUMER STATED HIS FOOT SLIPPED OFF THE BRAKE PEDAL AND SHATTERED THE GARAGE DOOR AND STOPPED ONLY AFTER HITTING THE OPPOSITE WALL AND STORAGE. THE CONSUMER STATED THE DAY AFTER THE INCIDE…
Read full complaint
2004 LEXUS RX330. CONSUMER WRITES IN REGARDS TO VEHICLE CRASH AND RECALL NOTICE CONCERNING FLOOR CARPET COVER AND RETENTION CLIPS *TGW THE CONSUMER STATED HIS FOOT SLIPPED OFF THE BRAKE PEDAL AND SHATTERED THE GARAGE DOOR AND STOPPED ONLY AFTER HITTING THE OPPOSITE WALL AND STORAGE. THE CONSUMER STATED THE DAY AFTER THE INCIDENT, HE RECEIVED A RECALL LETTER IN THE MAIL, REGARDING THE ACCELERATOR PEDAL.
TL* THE CONTACT OWNS A 2004 LEXUS RX330. THE CONTACT WAS DRIVING 5 MPH WHEN THE VEHICLE ABNORMALLY ACCELERATED AND CAUSED THE CONTACT TO CRASH INTO A LIGHT POLE. THE CONTACT SUSTAINED INJURIES BUT WAS NOT TRANSPORTED TO THE HOSPITAL. A POLICE REPORT WAS FILED. THE DRIVER SUSTAINED INJURY BUT WAS NOT SEEN BY A PHYSICIAN. THE …
Read full complaint
TL* THE CONTACT OWNS A 2004 LEXUS RX330. THE CONTACT WAS DRIVING 5 MPH WHEN THE VEHICLE ABNORMALLY ACCELERATED AND CAUSED THE CONTACT TO CRASH INTO A LIGHT POLE. THE CONTACT SUSTAINED INJURIES BUT WAS NOT TRANSPORTED TO THE HOSPITAL. A POLICE REPORT WAS FILED. THE DRIVER SUSTAINED INJURY BUT WAS NOT SEEN BY A PHYSICIAN. THE VEHICLE WAS TOWED FOR REPAIRS. NEITHER THE DEALER NOR THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE AND CURRENT MILEAGE WAS 111,000.
WHILE ATTEMPTING TO BACK SLOWLY OUT OF A PARKING SPACE, MY CAR WENT FROM 0 TO AT LEAST 40 MPH IN A MATTER OF SECONDS AND HIT A POLE ACROSS A PARKING LOT. ALTHOUGH I HAD MY FOOT OFF THE GAS, I WAS ATTEMPTING TO FIND THE BRAKE. THE ENTIRE INCIDENT HAPPENED IN A MATTER OF SECONDS. I REMEMBER FEELING TOTALLY OUT OF CONTROL OF THE …
Read full complaint
WHILE ATTEMPTING TO BACK SLOWLY OUT OF A PARKING SPACE, MY CAR WENT FROM 0 TO AT LEAST 40 MPH IN A MATTER OF SECONDS AND HIT A POLE ACROSS A PARKING LOT. ALTHOUGH I HAD MY FOOT OFF THE GAS, I WAS ATTEMPTING TO FIND THE BRAKE. THE ENTIRE INCIDENT HAPPENED IN A MATTER OF SECONDS. I REMEMBER FEELING TOTALLY OUT OF CONTROL OF THE CAR. THE POLE BEHIND ME WAS DRIVEN THROUGH MY SUV TO THE PASSENGER'S SEAT. *TR
Official recalls
511V539000 · Engine And Engine Cooling
Nov 9, 2011
TOYOTA IS RECALLING CERTAIN MODEL YEAR 2004 AVALON VEHICLES; 2004 AND 2005 CAMRY, CAMRY SOLARA, HIGHLANDER, AND SIENNA VEHICLES, 2006 HIGHLANDER HYBRID; 2004 AND 2005 LEXUS ES330 AND RX330; AND 2006 LEXUS RX400H VEHICLES MANUFACTURED FROM JUNE 1, 2004 THROUGH MARCH 31, 2005, EQUIPPED WITH THE 1MZ-FE OR 3MZ-FE ENGINE. THE AMOUNT OF ADHESIVE AGENT APPLIED BETWEEN THE OUTER RING AND THE TORSIONAL RUBBER DAMPER (INNER RING) IN THE CRANKSHAFT PULLEY MAY BE INADEQUATE. IF THE ADHESIVE IS INSUFFICIENT, THERE IS A POSSIBILITY THAT THE OUTER RING MAY BECOME MISALIGNED AND IT MAY NOT PROPERLY ROTATE WITH THE INNER RING, CAUSING NOISE AND/OR ILLUMINATION OF THE BATTERY DISCHARGE INDICATOR LIGHT.
Consequence & remedy
Consequence: IN SOME CASES, THE BELT FOR THE POWER STEERING PUMP MAY BECOME DETACHED FROM THE PULLEY WHICH COULD RESULT IN A LOSS OF POWER STEERING AND A SUDDEN INCREASE IN STEERING EFFORT, INCREASING THE RISK OF A CRASH.
Remedy: TOYOTA WILL NOTIFY OWNERS, AND DEALERS WILL CHECK THE CRANKSHAFT PULLEY TO IDENTIFY WHETHER IT WAS PRODUCED BY THE U.S. SUPPLIER. IF SO, THE DEALER WILL REPLACE THE PULLEY WITH A NEW ONE AT NO CHARGE. THE SAFETY RECALL IS EXPECTED TO BEGIN DURING EARLY JANUARY 2012. OWNERS MAY CONTACT TOYOTA AT 1-800-331-4331.
11V112000 · Vehicle Speed Control:accelerator Pedal
Feb 24, 2011
TOYOTA IS RECALLING CERTAIN MODEL YEAR 2004-2006 HIGHLANDER, HIGHLANDER HYBRID, AND MODEL YEAR 2004-2007 LEXUS RX330, RX350, AND RX400H VEHICLES. IF THE FORWARD RETENTION CLIP USED TO SECURE THE FLOOR CARPET COVER, WHICH IS LOCATED IN FRONT OF THE CENTER CONSOLE, IS NOT INSTALLED PROPERLY THE COVER MAY LEAN TOWARD THE ACCELERATOR PEDAL AND INTERFERE WITH THE ACCELERATOR PEDAL ARM.
Consequence & remedy
Consequence: IF THIS OCCURS, THE ACCELERATOR PEDAL MAY TEMPORARILY BECOME STUCK IN A PARTIALLY DEPRESSED POSITION RATHER THAN RETURN TO THE IDLE POSITION. A STUCK ACCELERATOR PEDAL MAY RESULT IN UNINTENDED AND SUSTAINED VEHICLE SPEEDS AND MAKE IT DIFFICULT TO STOP, INCREASING THE RISK OF A VEHICLE CRASH.
Remedy: DEALERS WILL REPLACE THE FLOOR CARPET COVER WITH A NEWLY DESIGNED ONE FREE OR CHARGE. THE SAFETY RECALL IS EXPECTED TO BEGIN DURING MARCH 2011. OWNERS MAY CONTACT TOYOTA AT 1-800-331-4331.
06V253000 · Vehicle Speed Control:accelerator Pedal
Jul 13, 2006
ON CERTAIN SPORT UTILITY AND HYBRID VEHICLES, THE TWO RETAINING CLIPS FOR THE DRIVER'S SIDE FORWARD CENTER CONSOLE CAN BECOME LOOSE. IF BOTH CLIPS SEPARATE FROM THE FLOOR CARPET COVER, THE COVER MAY LEAN TOWARD THE ACCELERATOR PEDAL, CAUSING INTERFERENCE WITH THE ACCELERATOR PEDAL ROD.
Consequence & remedy
Consequence: THIS CONDITION MAY INTERFERE WITH THE ACCELERATOR PEDAL RETURNING TO THE IDLE POSITION INCREASING THE RISK OF A CRASH.
Remedy: DEALERS WILL REPLACE THE TWO FLOOR CARPET COVER RETAINING CLIPS FREE OF CHARGE. THE RECALL BEGAN ON JULY 24, 2006, AND SHOULD BE COMPLETED BY EARLY SEPTEMBER 2006. OWNERS MAY CONTACT TOYOTA AT 1-800-331-4331 OR LEXUS AT 1-800-255-3987.
06V023000 · Seat Belts:rear/other
Jan 27, 2006
CERTAIN SPORT UTILITY VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 210, "SEAT BELT ASSEMBLY ANCHORAGES." THE ANCHOR BOLT FOR THE REAR, LEFT-HAND SIDE SEAT BELT BUCKLE DIRECTLY BEHIND THE DRIVER'S SEAT DOES NOT HAVE SUFFICIENT STRENGTH.
Consequence & remedy
Consequence: THE REAR SEAT OCCUPANT MAY NOT BE PROPERLY RESTRAINED IN THE EVENT OF A CRASH.
Remedy: DEALERS WILL REPLACE FREE OF CHARGE THE REAR, LEFT-HAND SIDE SEAT BELT BUCKLE ANCHOR BOLT WITH AN IMPROVED ONE. THE RECALL BEGAN ON FEBRUARY 3, 2006. OWNERS MAY CONTACT LEXUS AT 800-255-3987.
04V558000 · Exterior Lighting:brake Lights:switch
Nov 22, 2004
CERTAIN PASSENGER VEHICLES MAY BE EQUIPPED WITH AN IMPROPERLY DESIGNED BRAKE LIGHT SWITCH. A SILICON OXIDE BUILD-UP OCCURS ON THE CONTACTS INSIDE THE BRAKE LIGHT SWITCH, WHICH CAN MAKE IT INOPERABLE.
Consequence & remedy
Consequence: IF THE SWITCH IS INOPERABLE, THE BRAKE LIGHTS WILL NOT ILLUMINATE AND CAN INCREASE THE RISK OF A CRASH.
Remedy: DEALERS WILL REPLACE THE BRAKE LIGHT SWITCH. THE RECALL BEGAN DURING DECEMBER 2004. OWNERS SHOULD CONTACT TOYOTA AT 1-800-331-4331.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
2RQ10003 · Unintended And Uncontrolled Acceleration
Opened Feb 16, 2010 · Closed Mar 1, 2011
Status: closed (inferred from source dates) · Electrical System:software; Vehicle Speed Control:accelerator Pedal
On February 16, 2010, NHTSA's Office of Defects Investigation (ODI) opened RQ10-003 to determine whether the scope of prior Toyota recalls relating to potential unintended acceleration were sufficiently broad, including, among others, Toyota recalls 07E-082, 09V-388, 10V-017, and 10V-023.NHTSA also requested information regarding potential electronic causes of unintended acceleration in Toyota and Lexus vehicles.I. Pedal Interference from Floor mats, Carpet Covers and Plastic Pads in Carpets.During the RQ10-003 investigation, ODI reviewed a large volume of documents to assess whether additional vehicles should be recalled.Following the agency's analysis, NHTSA requested that Toyota recall additional vehicles.Toyota complied with the agency's request.The details of these recalls are set forth more fully in Toyota's reports to NHTSA pursuant to 49 CFR Part 573.These recalls are as follows:Recall 11V-112: (1) model year (MY) 2004-2006 Toyota Highlander and Highlander Hybrid; and, (2) MY 2004-2007 Lexus RX330,RX350, and RX400h (hybrid model). The total estimated population under this recall is 769,379 vehicles.This recall remedies potential accelerator pedal entrapment caused by a loose floor carpet cover (trim panel). Recall 11V-113: (1) MY 2003-2009 through 2009 Toyota 4Runner; (2) MY 2006-2010 Toyota RAV4; and, (3) MY 2008-2011 Lexus LX570.The total estimated population under this recall is 1,381,000 vehicles.This recall supplements recall 09V-388 and remedies potential accelerator pedal entrapment by an unsecured floor mat.Recall 11V-115: (1) MY 2006-2007 Lexus GS300 (all wheel drive vehicles); and, (2) MY 2006-2007 Lexus GS350 (all wheel drive vehicles). The total estimated population under this recall is 19,647 vehicles.This recall remedies potential accelerator pedal entrapment caused by inadequate clearance between the pedal linkage and a plastic pad embedded in the vehicle's carpet.II. Potential Electronic Causes of Unintended Acceleration.After NHTSA opened RQ10-003, NHTSA launched a ten-month study of potential electronic causes of unintended acceleration in Toyota vehicles.NHTSA launched the study in the spring of 2010 in light of concerns aired in Congressional hearings.NHTSA enlisted engineers at the National Aeronautics and Space Administration (NASA) with expertise in areas such as computer controlled electronic systems, electromagnetic interference and software integrity to assess whether electronic systems or electromagnetic interference played a role in incidents of unintended acceleration in Toyota vehicles.That study has concluded.Two reports are associated with the study and are available on NHTSA's website.NASA's report is entitled Technical Support to the National Highway Traffic Safety Administration (NHTSA) on the Reported Toyota Motor Corporation (TMC) Unintended Acceleration (UA) Investigation, NESC Assessment No. TI-10-00618 (Jan. 18, 2011).NHTSA's report is entitled Technical Assessment of Toyota Electronic Throttle Control (ETC) Systems (Feb. 2011).Both reports should be read in conjunction with each other. As stated in its report, NASA did not find an electronic cause of large throttle openings that can result in unintended acceleration incidents. NHTSA did not find a vehicle-based cause of unintended acceleration incidents other than the physical pedal interference causes that are being addressed by Toyota's recalls. This RQ is closed.
Additional source detail variants (6)
Electrical System:software
On February 16, 2010, NHTSA's Office of Defects Investigation (ODI) opened RQ10-003 to determine whether the scope of prior Toyota recalls relating to potential unintended acceleration were sufficiently broad, including, among others, Toyota recalls 07E-082, 09V-388, 10V-017, and 10V-023.NHTSA also requested information regarding potential electronic causes of unintended acceleration in Toyota and Lexus vehicles.I. Pedal Interference from Floor mats, Carpet Covers and Plastic Pads in Carpets.During the RQ10-003 investigation, ODI reviewed a large volume of documents to assess whether additional vehicles should be recalled.Following the agency's analysis, NHTSA requested that Toyota recall additional vehicles.Toyota complied with the agency's request.The details of these recalls are set forth more fully in Toyota's reports to NHTSA pursuant to 49 CFR Part 573.These recalls are as follows:Recall 11V-112: (1) model year (MY) 2004-2006 Toyota Highlander and Highlander Hybrid; and, (2) MY 2004-2007 Lexus RX330,RX350, and RX400h (hybrid model). The total estimated population under this recall is 769,379 vehicles.This recall remedies potential accelerator pedal entrapment caused by a loose floor carpet cover (trim panel). Recall 11V-113: (1) MY 2003-2009 through 2009 Toyota 4Runner; (2) MY 2006-2010 Toyota RAV4; and, (3) MY 2008-2011 Lexus LX570.The total estimated population under this recall is 1,381,000 vehicles.This recall supplements recall 09V-388 and remedies potential accelerator pedal entrapment by an unsecured floor mat.Recall 11V-115: (1) MY 2006-2007 Lexus GS300 (all wheel drive vehicles); and, (2) MY 2006-2007 Lexus GS350 (all wheel drive vehicles). The total estimated population under this recall is 19,647 vehicles.This recall remedies potential accelerator pedal entrapment caused by inadequate clearance between the pedal linkage and a plastic pad embedded in the vehicle's carpet.II. Potential Electronic Causes of Unintended Acceleration.After NHTSA opened RQ10-003, NHTSA launched a ten-month study of potential electronic causes of unintended acceleration in Toyota vehicles.NHTSA launched the study in the spring of 2010 in light of concerns aired in Congressional hearings.NHTSA enlisted engineers at the National Aeronautics and Space Administration (NASA) with expertise in areas such as computer controlled electronic systems, electromagnetic interference and software integrity to assess whether electronic systems or electromagnetic interference played a role in incidents of unintended acceleration in Toyota vehicles.That study has concluded.Two reports are associated with the study and are available on NHTSA's website.NASA's report is entitled Technical Support to the National Highway Traffic Safety Administration (NHTSA) on the Reported Toyota Motor Corporation (TMC) Unintended Acceleration (UA) Investigation, NESC Assessment No. TI-10-00618 (Jan. 18, 2011).NHTSA's report is entitled Technical Assessment of Toyota Electronic Throttle Control (ETC) Systems (Feb. 2011).Both reports should be read in conjunction with each other. As stated in its report, NASA did not find an electronic cause of large throttle openings that can result in unintended acceleration incidents. NHTSA did not find a vehicle-based cause of unintended acceleration incidents other than the physical pedal interference causes that are being addressed by Toyota's recalls. This RQ is closed.
Electrical System:software
On February 16, 2010, NHTSA's Office of Defects Investigation (ODI) opened RQ10-003 to determine whether the scope of prior Toyota recalls relating to potential unintended acceleration were sufficiently broad, including, among others, Toyota recalls 07E-082, 09V-388, 10V-017, and 10V-023.NHTSA also requested information regarding potential electronic causes of unintended acceleration in Toyota and Lexus vehicles.I. Pedal Interference from Floor mats, Carpet Covers and Plastic Pads in Carpets.During the RQ10-003 investigation, ODI reviewed a large volume of documents to assess whether additional vehicles should be recalled.Following the agency's analysis, NHTSA requested that Toyota recall additional vehicles.Toyota complied with the agency's request.The details of these recalls are set forth more fully in Toyota's reports to NHTSA pursuant to 49 CFR Part 573.These recalls are as follows:Recall 11V-112: (1) model year (MY) 2004-2006 Toyota Highlander and Highlander Hybrid; and, (2) MY 2004-2007 Lexus RX330,RX350, and RX400h (hybrid model). The total estimated population under this recall is 769,379 vehicles.This recall remedies potential accelerator pedal entrapment caused by a loose floor carpet cover (trim panel). Recall 11V-113: (1) MY 2003-2009 through 2009 Toyota 4Runner; (2) MY 2006-2010 Toyota RAV4; and, (3) MY 2008-2011 Lexus LX570.The total estimated population under this recall is 1,381,000 vehicles.This recall supplements recall 09V-388 and remedies potential accelerator pedal entrapment by an unsecured floor mat.Recall 11V-115: (1) MY 2006-2007 Lexus GS300 (all wheel drive vehicles); and, (2) MY 2006-2007 Lexus GS350 (all wheel drive vehicles). The total estimated population under this recall is 19,647 vehicles.This recall remedies potential accelerator pedal entrapment caused by inadequate clearance between the pedal linkage and a plastic pad embedded in the vehicle's carpet.II. Potential Electronic Causes of Unintended Acceleration.After NHTSA opened RQ10-003, NHTSA launched a ten-month study of potential electronic causes of unintended acceleration in Toyota vehicles.NHTSA launched the study in the spring of 2010 in light of concerns aired in Congressional hearings.NHTSA enlisted engineers at the National Aeronautics and Space Administration (NASA) with expertise in areas such as computer controlled electronic systems, electromagnetic interference and software integrity to assess whether electronic systems or electromagnetic interference played a role in incidents of unintended acceleration in Toyota vehicles.That study has concluded.Two reports are associated with the study and are available on NHTSA's website.NASA's report is entitled Technical Support to the National Highway Traffic Safety Administration (NHTSA) on the Reported Toyota Motor Corporation (TMC) Unintended Acceleration (UA) Investigation, NESC Assessment No. TI-10-00618 (Jan. 18, 2011).NHTSA's report is entitled Technical Assessment of Toyota Electronic Throttle Control (ETC) Systems (Feb. 2011).Both reports should be read in conjunction with each other. As stated in its report, NASA did not find an electronic cause of large throttle openings that can result in unintended acceleration incidents. NHTSA did not find a vehicle-based cause of unintended acceleration incidents other than the physical pedal interference causes that are being addressed by Toyota's recalls. This RQ is closed.
Electrical System:software
On February 16, 2010, NHTSA's Office of Defects Investigation (ODI) opened RQ10-003 to determine whether the scope of prior Toyota recalls relating to potential unintended acceleration were sufficiently broad, including, among others, Toyota recalls 07E-082, 09V-388, 10V-017, and 10V-023.NHTSA also requested information regarding potential electronic causes of unintended acceleration in Toyota and Lexus vehicles.I. Pedal Interference from Floor mats, Carpet Covers and Plastic Pads in Carpets.During the RQ10-003 investigation, ODI reviewed a large volume of documents to assess whether additional vehicles should be recalled.Following the agency's analysis, NHTSA requested that Toyota recall additional vehicles.Toyota complied with the agency's request.The details of these recalls are set forth more fully in Toyota's reports to NHTSA pursuant to 49 CFR Part 573.These recalls are as follows:Recall 11V-112: (1) model year (MY) 2004-2006 Toyota Highlander and Highlander Hybrid; and, (2) MY 2004-2007 Lexus RX330,RX350, and RX400h (hybrid model). The total estimated population under this recall is 769,379 vehicles.This recall remedies potential accelerator pedal entrapment caused by a loose floor carpet cover (trim panel). Recall 11V-113: (1) MY 2003-2009 through 2009 Toyota 4Runner; (2) MY 2006-2010 Toyota RAV4; and, (3) MY 2008-2011 Lexus LX570.The total estimated population under this recall is 1,381,000 vehicles.This recall supplements recall 09V-388 and remedies potential accelerator pedal entrapment by an unsecured floor mat.Recall 11V-115: (1) MY 2006-2007 Lexus GS300 (all wheel drive vehicles); and, (2) MY 2006-2007 Lexus GS350 (all wheel drive vehicles). The total estimated population under this recall is 19,647 vehicles.This recall remedies potential accelerator pedal entrapment caused by inadequate clearance between the pedal linkage and a plastic pad embedded in the vehicle's carpet.II. Potential Electronic Causes of Unintended Acceleration.After NHTSA opened RQ10-003, NHTSA launched a ten-month study of potential electronic causes of unintended acceleration in Toyota vehicles.NHTSA launched the study in the spring of 2010 in light of concerns aired in Congressional hearings.NHTSA enlisted engineers at the National Aeronautics and Space Administration (NASA) with expertise in areas such as computer controlled electronic systems, electromagnetic interference and software integrity to assess whether electronic systems or electromagnetic interference played a role in incidents of unintended acceleration in Toyota vehicles.That study has concluded.Two reports are associated with the study and are available on NHTSA's website.NASA's report is entitled Technical Support to the National Highway Traffic Safety Administration (NHTSA) on the Reported Toyota Motor Corporation (TMC) Unintended Acceleration (UA) Investigation, NESC Assessment No. TI-10-00618 (Jan. 18, 2011).NHTSA's report is entitled Technical Assessment of Toyota Electronic Throttle Control (ETC) Systems (Feb. 2011).Both reports should be read in conjunction with each other. As stated in its report, NASA did not find an electronic cause of large throttle openings that can result in unintended acceleration incidents. NHTSA did not find a vehicle-based cause of unintended acceleration incidents other than the physical pedal interference causes that are being addressed by Toyota's recalls. This RQ is closed.
Vehicle Speed Control:accelerator Pedal
On February 16, 2010, NHTSA's Office of Defects Investigation (ODI) opened RQ10-003 to determine whether the scope of prior Toyota recalls relating to potential unintended acceleration were sufficiently broad, including, among others, Toyota recalls 07E-082, 09V-388, 10V-017, and 10V-023.NHTSA also requested information regarding potential electronic causes of unintended acceleration in Toyota and Lexus vehicles.I. Pedal Interference from Floor mats, Carpet Covers and Plastic Pads in Carpets.During the RQ10-003 investigation, ODI reviewed a large volume of documents to assess whether additional vehicles should be recalled.Following the agency's analysis, NHTSA requested that Toyota recall additional vehicles.Toyota complied with the agency's request.The details of these recalls are set forth more fully in Toyota's reports to NHTSA pursuant to 49 CFR Part 573.These recalls are as follows:Recall 11V-112: (1) model year (MY) 2004-2006 Toyota Highlander and Highlander Hybrid; and, (2) MY 2004-2007 Lexus RX330,RX350, and RX400h (hybrid model). The total estimated population under this recall is 769,379 vehicles.This recall remedies potential accelerator pedal entrapment caused by a loose floor carpet cover (trim panel). Recall 11V-113: (1) MY 2003-2009 through 2009 Toyota 4Runner; (2) MY 2006-2010 Toyota RAV4; and, (3) MY 2008-2011 Lexus LX570.The total estimated population under this recall is 1,381,000 vehicles.This recall supplements recall 09V-388 and remedies potential accelerator pedal entrapment by an unsecured floor mat.Recall 11V-115: (1) MY 2006-2007 Lexus GS300 (all wheel drive vehicles); and, (2) MY 2006-2007 Lexus GS350 (all wheel drive vehicles). The total estimated population under this recall is 19,647 vehicles.This recall remedies potential accelerator pedal entrapment caused by inadequate clearance between the pedal linkage and a plastic pad embedded in the vehicle's carpet.II. Potential Electronic Causes of Unintended Acceleration.After NHTSA opened RQ10-003, NHTSA launched a ten-month study of potential electronic causes of unintended acceleration in Toyota vehicles.NHTSA launched the study in the spring of 2010 in light of concerns aired in Congressional hearings.NHTSA enlisted engineers at the National Aeronautics and Space Administration (NASA) with expertise in areas such as computer controlled electronic systems, electromagnetic interference and software integrity to assess whether electronic systems or electromagnetic interference played a role in incidents of unintended acceleration in Toyota vehicles.That study has concluded.Two reports are associated with the study and are available on NHTSA's website.NASA's report is entitled Technical Support to the National Highway Traffic Safety Administration (NHTSA) on the Reported Toyota Motor Corporation (TMC) Unintended Acceleration (UA) Investigation, NESC Assessment No. TI-10-00618 (Jan. 18, 2011).NHTSA's report is entitled Technical Assessment of Toyota Electronic Throttle Control (ETC) Systems (Feb. 2011).Both reports should be read in conjunction with each other. As stated in its report, NASA did not find an electronic cause of large throttle openings that can result in unintended acceleration incidents. NHTSA did not find a vehicle-based cause of unintended acceleration incidents other than the physical pedal interference causes that are being addressed by Toyota's recalls. This RQ is closed.
Vehicle Speed Control:accelerator Pedal
On February 16, 2010, NHTSA's Office of Defects Investigation (ODI) opened RQ10-003 to determine whether the scope of prior Toyota recalls relating to potential unintended acceleration were sufficiently broad, including, among others, Toyota recalls 07E-082, 09V-388, 10V-017, and 10V-023.NHTSA also requested information regarding potential electronic causes of unintended acceleration in Toyota and Lexus vehicles.I. Pedal Interference from Floor mats, Carpet Covers and Plastic Pads in Carpets.During the RQ10-003 investigation, ODI reviewed a large volume of documents to assess whether additional vehicles should be recalled.Following the agency's analysis, NHTSA requested that Toyota recall additional vehicles.Toyota complied with the agency's request.The details of these recalls are set forth more fully in Toyota's reports to NHTSA pursuant to 49 CFR Part 573.These recalls are as follows:Recall 11V-112: (1) model year (MY) 2004-2006 Toyota Highlander and Highlander Hybrid; and, (2) MY 2004-2007 Lexus RX330,RX350, and RX400h (hybrid model). The total estimated population under this recall is 769,379 vehicles.This recall remedies potential accelerator pedal entrapment caused by a loose floor carpet cover (trim panel). Recall 11V-113: (1) MY 2003-2009 through 2009 Toyota 4Runner; (2) MY 2006-2010 Toyota RAV4; and, (3) MY 2008-2011 Lexus LX570.The total estimated population under this recall is 1,381,000 vehicles.This recall supplements recall 09V-388 and remedies potential accelerator pedal entrapment by an unsecured floor mat.Recall 11V-115: (1) MY 2006-2007 Lexus GS300 (all wheel drive vehicles); and, (2) MY 2006-2007 Lexus GS350 (all wheel drive vehicles). The total estimated population under this recall is 19,647 vehicles.This recall remedies potential accelerator pedal entrapment caused by inadequate clearance between the pedal linkage and a plastic pad embedded in the vehicle's carpet.II. Potential Electronic Causes of Unintended Acceleration.After NHTSA opened RQ10-003, NHTSA launched a ten-month study of potential electronic causes of unintended acceleration in Toyota vehicles.NHTSA launched the study in the spring of 2010 in light of concerns aired in Congressional hearings.NHTSA enlisted engineers at the National Aeronautics and Space Administration (NASA) with expertise in areas such as computer controlled electronic systems, electromagnetic interference and software integrity to assess whether electronic systems or electromagnetic interference played a role in incidents of unintended acceleration in Toyota vehicles.That study has concluded.Two reports are associated with the study and are available on NHTSA's website.NASA's report is entitled Technical Support to the National Highway Traffic Safety Administration (NHTSA) on the Reported Toyota Motor Corporation (TMC) Unintended Acceleration (UA) Investigation, NESC Assessment No. TI-10-00618 (Jan. 18, 2011).NHTSA's report is entitled Technical Assessment of Toyota Electronic Throttle Control (ETC) Systems (Feb. 2011).Both reports should be read in conjunction with each other. As stated in its report, NASA did not find an electronic cause of large throttle openings that can result in unintended acceleration incidents. NHTSA did not find a vehicle-based cause of unintended acceleration incidents other than the physical pedal interference causes that are being addressed by Toyota's recalls. This RQ is closed.
Vehicle Speed Control:accelerator Pedal
On February 16, 2010, NHTSA's Office of Defects Investigation (ODI) opened RQ10-003 to determine whether the scope of prior Toyota recalls relating to potential unintended acceleration were sufficiently broad, including, among others, Toyota recalls 07E-082, 09V-388, 10V-017, and 10V-023.NHTSA also requested information regarding potential electronic causes of unintended acceleration in Toyota and Lexus vehicles.I. Pedal Interference from Floor mats, Carpet Covers and Plastic Pads in Carpets.During the RQ10-003 investigation, ODI reviewed a large volume of documents to assess whether additional vehicles should be recalled.Following the agency's analysis, NHTSA requested that Toyota recall additional vehicles.Toyota complied with the agency's request.The details of these recalls are set forth more fully in Toyota's reports to NHTSA pursuant to 49 CFR Part 573.These recalls are as follows:Recall 11V-112: (1) model year (MY) 2004-2006 Toyota Highlander and Highlander Hybrid; and, (2) MY 2004-2007 Lexus RX330,RX350, and RX400h (hybrid model). The total estimated population under this recall is 769,379 vehicles.This recall remedies potential accelerator pedal entrapment caused by a loose floor carpet cover (trim panel). Recall 11V-113: (1) MY 2003-2009 through 2009 Toyota 4Runner; (2) MY 2006-2010 Toyota RAV4; and, (3) MY 2008-2011 Lexus LX570.The total estimated population under this recall is 1,381,000 vehicles.This recall supplements recall 09V-388 and remedies potential accelerator pedal entrapment by an unsecured floor mat.Recall 11V-115: (1) MY 2006-2007 Lexus GS300 (all wheel drive vehicles); and, (2) MY 2006-2007 Lexus GS350 (all wheel drive vehicles). The total estimated population under this recall is 19,647 vehicles.This recall remedies potential accelerator pedal entrapment caused by inadequate clearance between the pedal linkage and a plastic pad embedded in the vehicle's carpet.II. Potential Electronic Causes of Unintended Acceleration.After NHTSA opened RQ10-003, NHTSA launched a ten-month study of potential electronic causes of unintended acceleration in Toyota vehicles.NHTSA launched the study in the spring of 2010 in light of concerns aired in Congressional hearings.NHTSA enlisted engineers at the National Aeronautics and Space Administration (NASA) with expertise in areas such as computer controlled electronic systems, electromagnetic interference and software integrity to assess whether electronic systems or electromagnetic interference played a role in incidents of unintended acceleration in Toyota vehicles.That study has concluded.Two reports are associated with the study and are available on NHTSA's website.NASA's report is entitled Technical Support to the National Highway Traffic Safety Administration (NHTSA) on the Reported Toyota Motor Corporation (TMC) Unintended Acceleration (UA) Investigation, NESC Assessment No. TI-10-00618 (Jan. 18, 2011).NHTSA's report is entitled Technical Assessment of Toyota Electronic Throttle Control (ETC) Systems (Feb. 2011).Both reports should be read in conjunction with each other. As stated in its report, NASA did not find an electronic cause of large throttle openings that can result in unintended acceleration incidents. NHTSA did not find a vehicle-based cause of unintended acceleration incidents other than the physical pedal interference causes that are being addressed by Toyota's recalls. This RQ is closed.
PE05009 · Vacuum Brake Booster Failure
Opened Feb 10, 2005 · Closed Jun 15, 2005
Status: closed (inferred from source dates) · Service Brakes, Hydraulic; Service Brakes, Hydraulic:foundation Components; Service Brakes, Hydraulic:foundation Components:master Cylinder; Service Brakes, Hydraulic:power Assist; Service Brakes, Hydraulic:power Assist:vacuum; Service Brakes, Hydraulic:power Assist:vacuum:hoses, Lines/piping, And Fittings
ON FEBRUARY 10, 2005, THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED A PRELIMINARY EVALUATION TO INVESTIGATE ALLEGED LOSS OF BRAKE POWER-ASSIST IN CERTAIN 2004 MODEL YEAR (MY) LEXUS RX330 VEHICLES BUILT THROUGH APPROXIMATELY JUNE 30, 2004.THE SUBJECT VEHICLES WERE MANUFACTURED AT TOYOTA MOTOR MANUFACTURING CANADA, INC.?S CAMBRIDGE, ONTARIO ASSEMBLY PLANT AND WERE EQUIPPED WITH VACUUM BRAKE BOOSTER ASSEMBLIES SOURCED FROM AISIN SEIKI CO., LTD (AISIN) SUBSIDIARY ADVICS NORTH AMERICA, INC. (ADVICS-NA).TO DATE, ODI IS AWARE OF 146 NON-DUPLICATIVE REPORTS THAT ALLEGE LOSS OF BRAKE POWER-ASSIST AND 6 CRASHES ALLEGEDLY CAUSED BY LOSS OF BRAKE POWER-ASSIST (RESULTING IN 1 MINOR INJURY) ON THE SUBJECT VEHICLES.THE SUBJECT VEHICLES USE A CONVENTIONAL BRAKE BOOSTER ASSEMBLY THAT CONTAINS A RUBBER DIAPHRAGM TO SEPARATE THE FORE AND AFT PRESSURE CHAMBERS.THE OUTER EDGE OF THE RUBBER DIAPHRAGM IS HELD IN PLACE VIA A RETAINING GROOVE ON THE BRAKE BOOSTER BODY.IF THE BOOSTER LOSES VACUUM (E.G., OPERATOR DEPLETES THE VACUUM BY PRESSING THE BRAKE PEDAL SEVERAL TIMES WHILE THE ENGINE IS OFF), IT MAY CAUSE THE DIAPHRAGM TO DEFORM IN THE AREA OF THE RETAINING GROOVE TO THE POINT THAT INSUFFICIENT SEAL EXISTS BETWEEN DIAPHRAGM AND BOOSTER BODY, THUS CAUSING A MOMENTARY LOSS OF BRAKE POWER-ASSIST.THE ADVICS-NA SUPPLIED DIAPHRAGM HAS SLIGHTLY DIFFERENT MATERIAL PROPERTIES COMPARED TO THE DIAPHRAGM INSIDE BRAKE BOOSTERS SUPPLIED BY ADVICS JAPAN, CORP. (ADVICS-J) AND USED ON 2004MY LEXUS RX330 VEHICLES MANUFACTURED AT TOYOTA MOTOR KYUSHU, INC.?S ASSEMBLY PLANT.THE SOFTER RUBBER USED IN THE ADVICS-NA DIAPHRAGM ALLOWS GREATER DEFORMATION AND IS LESS RESILIENT WHEN COMPARED TO THE ADVICS-J DIAPHRAGM.LOSS OF BRAKE POWER-ASSIST MOST OFTEN OCCURS AT VEHICLE START-UP AND APPEARS TO BE MORE PREVALENT IN COLDER TEMPERATURES.MOST OWNERS REPORT THAT BRAKE SYSTEM OPERATION RETURNS TO NORMAL WITHIN A FEW SECONDS AFTER VEHICLE START-UP.TESTING CONDUCTED BY THE MANUFACTURER INDICATES THAT THE ADVICS-NA DIAPHRAGM?S REDUCED ABILITY TO RETURN TO SHAPE IS EXACERBATED BY COLDER TEMPERATURES AND THAT LOSS OF BRAKE POWER-ASSIST AT START-UP MAY LAST FOR A MAXIMUM OF 95 SECONDS AT TEMPERATURES BELOW ?20 DEGREES CELSIUS.HOWEVER, THE SUBJECT VEHICLES HAVE A BACK-UP SYSTEM THAT CAN SENSE A LOSS OF BRAKE POWER-ASSIST AND ENABLE THE ABS ACTUATOR FOR BRAKE HYDRAULIC PRESSURE SUPPORT (I.E., BRAKE PEDAL FORCE ASSIST).THE MANUFACTURER WILL CONDUCT A SERVICE CAMPAIGN (LEXUS SPECIAL SERVICE CAMPAIGN #5LA) TO REPLACE THE VACUUM BRAKE BOOSTER ASSEMBLY ON ALL AFFECTED SUBJECT VEHICLES.THE ACTION TAKEN BY THE MANUFACTURER IS SUFFICIENT TO RESOLVE THE ISSUES RAISED BY THIS INVESTIGATION.ACCORDINGLY, THIS INVESTIGATION IS CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT A SAFETY-RELATED DEFECT DOES NOT EXIST.THE AGENCY WILL TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.
Additional source detail variants (6)
Service Brakes, Hydraulic:foundation Components:master Cylinder
ON FEBRUARY 10, 2005, THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED A PRELIMINARY EVALUATION TO INVESTIGATE ALLEGED LOSS OF BRAKE POWER-ASSIST IN CERTAIN 2004 MODEL YEAR (MY) LEXUS RX330 VEHICLES BUILT THROUGH APPROXIMATELY JUNE 30, 2004.THE SUBJECT VEHICLES WERE MANUFACTURED AT TOYOTA MOTOR MANUFACTURING CANADA, INC.?S CAMBRIDGE, ONTARIO ASSEMBLY PLANT AND WERE EQUIPPED WITH VACUUM BRAKE BOOSTER ASSEMBLIES SOURCED FROM AISIN SEIKI CO., LTD (AISIN) SUBSIDIARY ADVICS NORTH AMERICA, INC. (ADVICS-NA).TO DATE, ODI IS AWARE OF 146 NON-DUPLICATIVE REPORTS THAT ALLEGE LOSS OF BRAKE POWER-ASSIST AND 6 CRASHES ALLEGEDLY CAUSED BY LOSS OF BRAKE POWER-ASSIST (RESULTING IN 1 MINOR INJURY) ON THE SUBJECT VEHICLES.THE SUBJECT VEHICLES USE A CONVENTIONAL BRAKE BOOSTER ASSEMBLY THAT CONTAINS A RUBBER DIAPHRAGM TO SEPARATE THE FORE AND AFT PRESSURE CHAMBERS.THE OUTER EDGE OF THE RUBBER DIAPHRAGM IS HELD IN PLACE VIA A RETAINING GROOVE ON THE BRAKE BOOSTER BODY.IF THE BOOSTER LOSES VACUUM (E.G., OPERATOR DEPLETES THE VACUUM BY PRESSING THE BRAKE PEDAL SEVERAL TIMES WHILE THE ENGINE IS OFF), IT MAY CAUSE THE DIAPHRAGM TO DEFORM IN THE AREA OF THE RETAINING GROOVE TO THE POINT THAT INSUFFICIENT SEAL EXISTS BETWEEN DIAPHRAGM AND BOOSTER BODY, THUS CAUSING A MOMENTARY LOSS OF BRAKE POWER-ASSIST.THE ADVICS-NA SUPPLIED DIAPHRAGM HAS SLIGHTLY DIFFERENT MATERIAL PROPERTIES COMPARED TO THE DIAPHRAGM INSIDE BRAKE BOOSTERS SUPPLIED BY ADVICS JAPAN, CORP. (ADVICS-J) AND USED ON 2004MY LEXUS RX330 VEHICLES MANUFACTURED AT TOYOTA MOTOR KYUSHU, INC.?S ASSEMBLY PLANT.THE SOFTER RUBBER USED IN THE ADVICS-NA DIAPHRAGM ALLOWS GREATER DEFORMATION AND IS LESS RESILIENT WHEN COMPARED TO THE ADVICS-J DIAPHRAGM.LOSS OF BRAKE POWER-ASSIST MOST OFTEN OCCURS AT VEHICLE START-UP AND APPEARS TO BE MORE PREVALENT IN COLDER TEMPERATURES.MOST OWNERS REPORT THAT BRAKE SYSTEM OPERATION RETURNS TO NORMAL WITHIN A FEW SECONDS AFTER VEHICLE START-UP.TESTING CONDUCTED BY THE MANUFACTURER INDICATES THAT THE ADVICS-NA DIAPHRAGM?S REDUCED ABILITY TO RETURN TO SHAPE IS EXACERBATED BY COLDER TEMPERATURES AND THAT LOSS OF BRAKE POWER-ASSIST AT START-UP MAY LAST FOR A MAXIMUM OF 95 SECONDS AT TEMPERATURES BELOW ?20 DEGREES CELSIUS.HOWEVER, THE SUBJECT VEHICLES HAVE A BACK-UP SYSTEM THAT CAN SENSE A LOSS OF BRAKE POWER-ASSIST AND ENABLE THE ABS ACTUATOR FOR BRAKE HYDRAULIC PRESSURE SUPPORT (I.E., BRAKE PEDAL FORCE ASSIST).THE MANUFACTURER WILL CONDUCT A SERVICE CAMPAIGN (LEXUS SPECIAL SERVICE CAMPAIGN #5LA) TO REPLACE THE VACUUM BRAKE BOOSTER ASSEMBLY ON ALL AFFECTED SUBJECT VEHICLES.THE ACTION TAKEN BY THE MANUFACTURER IS SUFFICIENT TO RESOLVE THE ISSUES RAISED BY THIS INVESTIGATION.ACCORDINGLY, THIS INVESTIGATION IS CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT A SAFETY-RELATED DEFECT DOES NOT EXIST.THE AGENCY WILL TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.
Service Brakes, Hydraulic:foundation Components
ON FEBRUARY 10, 2005, THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED A PRELIMINARY EVALUATION TO INVESTIGATE ALLEGED LOSS OF BRAKE POWER-ASSIST IN CERTAIN 2004 MODEL YEAR (MY) LEXUS RX330 VEHICLES BUILT THROUGH APPROXIMATELY JUNE 30, 2004.THE SUBJECT VEHICLES WERE MANUFACTURED AT TOYOTA MOTOR MANUFACTURING CANADA, INC.?S CAMBRIDGE, ONTARIO ASSEMBLY PLANT AND WERE EQUIPPED WITH VACUUM BRAKE BOOSTER ASSEMBLIES SOURCED FROM AISIN SEIKI CO., LTD (AISIN) SUBSIDIARY ADVICS NORTH AMERICA, INC. (ADVICS-NA).TO DATE, ODI IS AWARE OF 146 NON-DUPLICATIVE REPORTS THAT ALLEGE LOSS OF BRAKE POWER-ASSIST AND 6 CRASHES ALLEGEDLY CAUSED BY LOSS OF BRAKE POWER-ASSIST (RESULTING IN 1 MINOR INJURY) ON THE SUBJECT VEHICLES.THE SUBJECT VEHICLES USE A CONVENTIONAL BRAKE BOOSTER ASSEMBLY THAT CONTAINS A RUBBER DIAPHRAGM TO SEPARATE THE FORE AND AFT PRESSURE CHAMBERS.THE OUTER EDGE OF THE RUBBER DIAPHRAGM IS HELD IN PLACE VIA A RETAINING GROOVE ON THE BRAKE BOOSTER BODY.IF THE BOOSTER LOSES VACUUM (E.G., OPERATOR DEPLETES THE VACUUM BY PRESSING THE BRAKE PEDAL SEVERAL TIMES WHILE THE ENGINE IS OFF), IT MAY CAUSE THE DIAPHRAGM TO DEFORM IN THE AREA OF THE RETAINING GROOVE TO THE POINT THAT INSUFFICIENT SEAL EXISTS BETWEEN DIAPHRAGM AND BOOSTER BODY, THUS CAUSING A MOMENTARY LOSS OF BRAKE POWER-ASSIST.THE ADVICS-NA SUPPLIED DIAPHRAGM HAS SLIGHTLY DIFFERENT MATERIAL PROPERTIES COMPARED TO THE DIAPHRAGM INSIDE BRAKE BOOSTERS SUPPLIED BY ADVICS JAPAN, CORP. (ADVICS-J) AND USED ON 2004MY LEXUS RX330 VEHICLES MANUFACTURED AT TOYOTA MOTOR KYUSHU, INC.?S ASSEMBLY PLANT.THE SOFTER RUBBER USED IN THE ADVICS-NA DIAPHRAGM ALLOWS GREATER DEFORMATION AND IS LESS RESILIENT WHEN COMPARED TO THE ADVICS-J DIAPHRAGM.LOSS OF BRAKE POWER-ASSIST MOST OFTEN OCCURS AT VEHICLE START-UP AND APPEARS TO BE MORE PREVALENT IN COLDER TEMPERATURES.MOST OWNERS REPORT THAT BRAKE SYSTEM OPERATION RETURNS TO NORMAL WITHIN A FEW SECONDS AFTER VEHICLE START-UP.TESTING CONDUCTED BY THE MANUFACTURER INDICATES THAT THE ADVICS-NA DIAPHRAGM?S REDUCED ABILITY TO RETURN TO SHAPE IS EXACERBATED BY COLDER TEMPERATURES AND THAT LOSS OF BRAKE POWER-ASSIST AT START-UP MAY LAST FOR A MAXIMUM OF 95 SECONDS AT TEMPERATURES BELOW ?20 DEGREES CELSIUS.HOWEVER, THE SUBJECT VEHICLES HAVE A BACK-UP SYSTEM THAT CAN SENSE A LOSS OF BRAKE POWER-ASSIST AND ENABLE THE ABS ACTUATOR FOR BRAKE HYDRAULIC PRESSURE SUPPORT (I.E., BRAKE PEDAL FORCE ASSIST).THE MANUFACTURER WILL CONDUCT A SERVICE CAMPAIGN (LEXUS SPECIAL SERVICE CAMPAIGN #5LA) TO REPLACE THE VACUUM BRAKE BOOSTER ASSEMBLY ON ALL AFFECTED SUBJECT VEHICLES.THE ACTION TAKEN BY THE MANUFACTURER IS SUFFICIENT TO RESOLVE THE ISSUES RAISED BY THIS INVESTIGATION.ACCORDINGLY, THIS INVESTIGATION IS CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT A SAFETY-RELATED DEFECT DOES NOT EXIST.THE AGENCY WILL TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.
Service Brakes, Hydraulic:power Assist
ON FEBRUARY 10, 2005, THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED A PRELIMINARY EVALUATION TO INVESTIGATE ALLEGED LOSS OF BRAKE POWER-ASSIST IN CERTAIN 2004 MODEL YEAR (MY) LEXUS RX330 VEHICLES BUILT THROUGH APPROXIMATELY JUNE 30, 2004.THE SUBJECT VEHICLES WERE MANUFACTURED AT TOYOTA MOTOR MANUFACTURING CANADA, INC.?S CAMBRIDGE, ONTARIO ASSEMBLY PLANT AND WERE EQUIPPED WITH VACUUM BRAKE BOOSTER ASSEMBLIES SOURCED FROM AISIN SEIKI CO., LTD (AISIN) SUBSIDIARY ADVICS NORTH AMERICA, INC. (ADVICS-NA).TO DATE, ODI IS AWARE OF 146 NON-DUPLICATIVE REPORTS THAT ALLEGE LOSS OF BRAKE POWER-ASSIST AND 6 CRASHES ALLEGEDLY CAUSED BY LOSS OF BRAKE POWER-ASSIST (RESULTING IN 1 MINOR INJURY) ON THE SUBJECT VEHICLES.THE SUBJECT VEHICLES USE A CONVENTIONAL BRAKE BOOSTER ASSEMBLY THAT CONTAINS A RUBBER DIAPHRAGM TO SEPARATE THE FORE AND AFT PRESSURE CHAMBERS.THE OUTER EDGE OF THE RUBBER DIAPHRAGM IS HELD IN PLACE VIA A RETAINING GROOVE ON THE BRAKE BOOSTER BODY.IF THE BOOSTER LOSES VACUUM (E.G., OPERATOR DEPLETES THE VACUUM BY PRESSING THE BRAKE PEDAL SEVERAL TIMES WHILE THE ENGINE IS OFF), IT MAY CAUSE THE DIAPHRAGM TO DEFORM IN THE AREA OF THE RETAINING GROOVE TO THE POINT THAT INSUFFICIENT SEAL EXISTS BETWEEN DIAPHRAGM AND BOOSTER BODY, THUS CAUSING A MOMENTARY LOSS OF BRAKE POWER-ASSIST.THE ADVICS-NA SUPPLIED DIAPHRAGM HAS SLIGHTLY DIFFERENT MATERIAL PROPERTIES COMPARED TO THE DIAPHRAGM INSIDE BRAKE BOOSTERS SUPPLIED BY ADVICS JAPAN, CORP. (ADVICS-J) AND USED ON 2004MY LEXUS RX330 VEHICLES MANUFACTURED AT TOYOTA MOTOR KYUSHU, INC.?S ASSEMBLY PLANT.THE SOFTER RUBBER USED IN THE ADVICS-NA DIAPHRAGM ALLOWS GREATER DEFORMATION AND IS LESS RESILIENT WHEN COMPARED TO THE ADVICS-J DIAPHRAGM.LOSS OF BRAKE POWER-ASSIST MOST OFTEN OCCURS AT VEHICLE START-UP AND APPEARS TO BE MORE PREVALENT IN COLDER TEMPERATURES.MOST OWNERS REPORT THAT BRAKE SYSTEM OPERATION RETURNS TO NORMAL WITHIN A FEW SECONDS AFTER VEHICLE START-UP.TESTING CONDUCTED BY THE MANUFACTURER INDICATES THAT THE ADVICS-NA DIAPHRAGM?S REDUCED ABILITY TO RETURN TO SHAPE IS EXACERBATED BY COLDER TEMPERATURES AND THAT LOSS OF BRAKE POWER-ASSIST AT START-UP MAY LAST FOR A MAXIMUM OF 95 SECONDS AT TEMPERATURES BELOW ?20 DEGREES CELSIUS.HOWEVER, THE SUBJECT VEHICLES HAVE A BACK-UP SYSTEM THAT CAN SENSE A LOSS OF BRAKE POWER-ASSIST AND ENABLE THE ABS ACTUATOR FOR BRAKE HYDRAULIC PRESSURE SUPPORT (I.E., BRAKE PEDAL FORCE ASSIST).THE MANUFACTURER WILL CONDUCT A SERVICE CAMPAIGN (LEXUS SPECIAL SERVICE CAMPAIGN #5LA) TO REPLACE THE VACUUM BRAKE BOOSTER ASSEMBLY ON ALL AFFECTED SUBJECT VEHICLES.THE ACTION TAKEN BY THE MANUFACTURER IS SUFFICIENT TO RESOLVE THE ISSUES RAISED BY THIS INVESTIGATION.ACCORDINGLY, THIS INVESTIGATION IS CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT A SAFETY-RELATED DEFECT DOES NOT EXIST.THE AGENCY WILL TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.
Service Brakes, Hydraulic:power Assist:vacuum:hoses, Lines/piping, And Fittings
ON FEBRUARY 10, 2005, THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED A PRELIMINARY EVALUATION TO INVESTIGATE ALLEGED LOSS OF BRAKE POWER-ASSIST IN CERTAIN 2004 MODEL YEAR (MY) LEXUS RX330 VEHICLES BUILT THROUGH APPROXIMATELY JUNE 30, 2004.THE SUBJECT VEHICLES WERE MANUFACTURED AT TOYOTA MOTOR MANUFACTURING CANADA, INC.?S CAMBRIDGE, ONTARIO ASSEMBLY PLANT AND WERE EQUIPPED WITH VACUUM BRAKE BOOSTER ASSEMBLIES SOURCED FROM AISIN SEIKI CO., LTD (AISIN) SUBSIDIARY ADVICS NORTH AMERICA, INC. (ADVICS-NA).TO DATE, ODI IS AWARE OF 146 NON-DUPLICATIVE REPORTS THAT ALLEGE LOSS OF BRAKE POWER-ASSIST AND 6 CRASHES ALLEGEDLY CAUSED BY LOSS OF BRAKE POWER-ASSIST (RESULTING IN 1 MINOR INJURY) ON THE SUBJECT VEHICLES.THE SUBJECT VEHICLES USE A CONVENTIONAL BRAKE BOOSTER ASSEMBLY THAT CONTAINS A RUBBER DIAPHRAGM TO SEPARATE THE FORE AND AFT PRESSURE CHAMBERS.THE OUTER EDGE OF THE RUBBER DIAPHRAGM IS HELD IN PLACE VIA A RETAINING GROOVE ON THE BRAKE BOOSTER BODY.IF THE BOOSTER LOSES VACUUM (E.G., OPERATOR DEPLETES THE VACUUM BY PRESSING THE BRAKE PEDAL SEVERAL TIMES WHILE THE ENGINE IS OFF), IT MAY CAUSE THE DIAPHRAGM TO DEFORM IN THE AREA OF THE RETAINING GROOVE TO THE POINT THAT INSUFFICIENT SEAL EXISTS BETWEEN DIAPHRAGM AND BOOSTER BODY, THUS CAUSING A MOMENTARY LOSS OF BRAKE POWER-ASSIST.THE ADVICS-NA SUPPLIED DIAPHRAGM HAS SLIGHTLY DIFFERENT MATERIAL PROPERTIES COMPARED TO THE DIAPHRAGM INSIDE BRAKE BOOSTERS SUPPLIED BY ADVICS JAPAN, CORP. (ADVICS-J) AND USED ON 2004MY LEXUS RX330 VEHICLES MANUFACTURED AT TOYOTA MOTOR KYUSHU, INC.?S ASSEMBLY PLANT.THE SOFTER RUBBER USED IN THE ADVICS-NA DIAPHRAGM ALLOWS GREATER DEFORMATION AND IS LESS RESILIENT WHEN COMPARED TO THE ADVICS-J DIAPHRAGM.LOSS OF BRAKE POWER-ASSIST MOST OFTEN OCCURS AT VEHICLE START-UP AND APPEARS TO BE MORE PREVALENT IN COLDER TEMPERATURES.MOST OWNERS REPORT THAT BRAKE SYSTEM OPERATION RETURNS TO NORMAL WITHIN A FEW SECONDS AFTER VEHICLE START-UP.TESTING CONDUCTED BY THE MANUFACTURER INDICATES THAT THE ADVICS-NA DIAPHRAGM?S REDUCED ABILITY TO RETURN TO SHAPE IS EXACERBATED BY COLDER TEMPERATURES AND THAT LOSS OF BRAKE POWER-ASSIST AT START-UP MAY LAST FOR A MAXIMUM OF 95 SECONDS AT TEMPERATURES BELOW ?20 DEGREES CELSIUS.HOWEVER, THE SUBJECT VEHICLES HAVE A BACK-UP SYSTEM THAT CAN SENSE A LOSS OF BRAKE POWER-ASSIST AND ENABLE THE ABS ACTUATOR FOR BRAKE HYDRAULIC PRESSURE SUPPORT (I.E., BRAKE PEDAL FORCE ASSIST).THE MANUFACTURER WILL CONDUCT A SERVICE CAMPAIGN (LEXUS SPECIAL SERVICE CAMPAIGN #5LA) TO REPLACE THE VACUUM BRAKE BOOSTER ASSEMBLY ON ALL AFFECTED SUBJECT VEHICLES.THE ACTION TAKEN BY THE MANUFACTURER IS SUFFICIENT TO RESOLVE THE ISSUES RAISED BY THIS INVESTIGATION.ACCORDINGLY, THIS INVESTIGATION IS CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT A SAFETY-RELATED DEFECT DOES NOT EXIST.THE AGENCY WILL TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.
Service Brakes, Hydraulic:power Assist:vacuum
ON FEBRUARY 10, 2005, THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED A PRELIMINARY EVALUATION TO INVESTIGATE ALLEGED LOSS OF BRAKE POWER-ASSIST IN CERTAIN 2004 MODEL YEAR (MY) LEXUS RX330 VEHICLES BUILT THROUGH APPROXIMATELY JUNE 30, 2004.THE SUBJECT VEHICLES WERE MANUFACTURED AT TOYOTA MOTOR MANUFACTURING CANADA, INC.?S CAMBRIDGE, ONTARIO ASSEMBLY PLANT AND WERE EQUIPPED WITH VACUUM BRAKE BOOSTER ASSEMBLIES SOURCED FROM AISIN SEIKI CO., LTD (AISIN) SUBSIDIARY ADVICS NORTH AMERICA, INC. (ADVICS-NA).TO DATE, ODI IS AWARE OF 146 NON-DUPLICATIVE REPORTS THAT ALLEGE LOSS OF BRAKE POWER-ASSIST AND 6 CRASHES ALLEGEDLY CAUSED BY LOSS OF BRAKE POWER-ASSIST (RESULTING IN 1 MINOR INJURY) ON THE SUBJECT VEHICLES.THE SUBJECT VEHICLES USE A CONVENTIONAL BRAKE BOOSTER ASSEMBLY THAT CONTAINS A RUBBER DIAPHRAGM TO SEPARATE THE FORE AND AFT PRESSURE CHAMBERS.THE OUTER EDGE OF THE RUBBER DIAPHRAGM IS HELD IN PLACE VIA A RETAINING GROOVE ON THE BRAKE BOOSTER BODY.IF THE BOOSTER LOSES VACUUM (E.G., OPERATOR DEPLETES THE VACUUM BY PRESSING THE BRAKE PEDAL SEVERAL TIMES WHILE THE ENGINE IS OFF), IT MAY CAUSE THE DIAPHRAGM TO DEFORM IN THE AREA OF THE RETAINING GROOVE TO THE POINT THAT INSUFFICIENT SEAL EXISTS BETWEEN DIAPHRAGM AND BOOSTER BODY, THUS CAUSING A MOMENTARY LOSS OF BRAKE POWER-ASSIST.THE ADVICS-NA SUPPLIED DIAPHRAGM HAS SLIGHTLY DIFFERENT MATERIAL PROPERTIES COMPARED TO THE DIAPHRAGM INSIDE BRAKE BOOSTERS SUPPLIED BY ADVICS JAPAN, CORP. (ADVICS-J) AND USED ON 2004MY LEXUS RX330 VEHICLES MANUFACTURED AT TOYOTA MOTOR KYUSHU, INC.?S ASSEMBLY PLANT.THE SOFTER RUBBER USED IN THE ADVICS-NA DIAPHRAGM ALLOWS GREATER DEFORMATION AND IS LESS RESILIENT WHEN COMPARED TO THE ADVICS-J DIAPHRAGM.LOSS OF BRAKE POWER-ASSIST MOST OFTEN OCCURS AT VEHICLE START-UP AND APPEARS TO BE MORE PREVALENT IN COLDER TEMPERATURES.MOST OWNERS REPORT THAT BRAKE SYSTEM OPERATION RETURNS TO NORMAL WITHIN A FEW SECONDS AFTER VEHICLE START-UP.TESTING CONDUCTED BY THE MANUFACTURER INDICATES THAT THE ADVICS-NA DIAPHRAGM?S REDUCED ABILITY TO RETURN TO SHAPE IS EXACERBATED BY COLDER TEMPERATURES AND THAT LOSS OF BRAKE POWER-ASSIST AT START-UP MAY LAST FOR A MAXIMUM OF 95 SECONDS AT TEMPERATURES BELOW ?20 DEGREES CELSIUS.HOWEVER, THE SUBJECT VEHICLES HAVE A BACK-UP SYSTEM THAT CAN SENSE A LOSS OF BRAKE POWER-ASSIST AND ENABLE THE ABS ACTUATOR FOR BRAKE HYDRAULIC PRESSURE SUPPORT (I.E., BRAKE PEDAL FORCE ASSIST).THE MANUFACTURER WILL CONDUCT A SERVICE CAMPAIGN (LEXUS SPECIAL SERVICE CAMPAIGN #5LA) TO REPLACE THE VACUUM BRAKE BOOSTER ASSEMBLY ON ALL AFFECTED SUBJECT VEHICLES.THE ACTION TAKEN BY THE MANUFACTURER IS SUFFICIENT TO RESOLVE THE ISSUES RAISED BY THIS INVESTIGATION.ACCORDINGLY, THIS INVESTIGATION IS CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT A SAFETY-RELATED DEFECT DOES NOT EXIST.THE AGENCY WILL TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.
Service Brakes, Hydraulic
ON FEBRUARY 10, 2005, THE OFFICE OF DEFECTS INVESTIGATION (ODI) OPENED A PRELIMINARY EVALUATION TO INVESTIGATE ALLEGED LOSS OF BRAKE POWER-ASSIST IN CERTAIN 2004 MODEL YEAR (MY) LEXUS RX330 VEHICLES BUILT THROUGH APPROXIMATELY JUNE 30, 2004.THE SUBJECT VEHICLES WERE MANUFACTURED AT TOYOTA MOTOR MANUFACTURING CANADA, INC.?S CAMBRIDGE, ONTARIO ASSEMBLY PLANT AND WERE EQUIPPED WITH VACUUM BRAKE BOOSTER ASSEMBLIES SOURCED FROM AISIN SEIKI CO., LTD (AISIN) SUBSIDIARY ADVICS NORTH AMERICA, INC. (ADVICS-NA).TO DATE, ODI IS AWARE OF 146 NON-DUPLICATIVE REPORTS THAT ALLEGE LOSS OF BRAKE POWER-ASSIST AND 6 CRASHES ALLEGEDLY CAUSED BY LOSS OF BRAKE POWER-ASSIST (RESULTING IN 1 MINOR INJURY) ON THE SUBJECT VEHICLES.THE SUBJECT VEHICLES USE A CONVENTIONAL BRAKE BOOSTER ASSEMBLY THAT CONTAINS A RUBBER DIAPHRAGM TO SEPARATE THE FORE AND AFT PRESSURE CHAMBERS.THE OUTER EDGE OF THE RUBBER DIAPHRAGM IS HELD IN PLACE VIA A RETAINING GROOVE ON THE BRAKE BOOSTER BODY.IF THE BOOSTER LOSES VACUUM (E.G., OPERATOR DEPLETES THE VACUUM BY PRESSING THE BRAKE PEDAL SEVERAL TIMES WHILE THE ENGINE IS OFF), IT MAY CAUSE THE DIAPHRAGM TO DEFORM IN THE AREA OF THE RETAINING GROOVE TO THE POINT THAT INSUFFICIENT SEAL EXISTS BETWEEN DIAPHRAGM AND BOOSTER BODY, THUS CAUSING A MOMENTARY LOSS OF BRAKE POWER-ASSIST.THE ADVICS-NA SUPPLIED DIAPHRAGM HAS SLIGHTLY DIFFERENT MATERIAL PROPERTIES COMPARED TO THE DIAPHRAGM INSIDE BRAKE BOOSTERS SUPPLIED BY ADVICS JAPAN, CORP. (ADVICS-J) AND USED ON 2004MY LEXUS RX330 VEHICLES MANUFACTURED AT TOYOTA MOTOR KYUSHU, INC.?S ASSEMBLY PLANT.THE SOFTER RUBBER USED IN THE ADVICS-NA DIAPHRAGM ALLOWS GREATER DEFORMATION AND IS LESS RESILIENT WHEN COMPARED TO THE ADVICS-J DIAPHRAGM.LOSS OF BRAKE POWER-ASSIST MOST OFTEN OCCURS AT VEHICLE START-UP AND APPEARS TO BE MORE PREVALENT IN COLDER TEMPERATURES.MOST OWNERS REPORT THAT BRAKE SYSTEM OPERATION RETURNS TO NORMAL WITHIN A FEW SECONDS AFTER VEHICLE START-UP.TESTING CONDUCTED BY THE MANUFACTURER INDICATES THAT THE ADVICS-NA DIAPHRAGM?S REDUCED ABILITY TO RETURN TO SHAPE IS EXACERBATED BY COLDER TEMPERATURES AND THAT LOSS OF BRAKE POWER-ASSIST AT START-UP MAY LAST FOR A MAXIMUM OF 95 SECONDS AT TEMPERATURES BELOW ?20 DEGREES CELSIUS.HOWEVER, THE SUBJECT VEHICLES HAVE A BACK-UP SYSTEM THAT CAN SENSE A LOSS OF BRAKE POWER-ASSIST AND ENABLE THE ABS ACTUATOR FOR BRAKE HYDRAULIC PRESSURE SUPPORT (I.E., BRAKE PEDAL FORCE ASSIST).THE MANUFACTURER WILL CONDUCT A SERVICE CAMPAIGN (LEXUS SPECIAL SERVICE CAMPAIGN #5LA) TO REPLACE THE VACUUM BRAKE BOOSTER ASSEMBLY ON ALL AFFECTED SUBJECT VEHICLES.THE ACTION TAKEN BY THE MANUFACTURER IS SUFFICIENT TO RESOLVE THE ISSUES RAISED BY THIS INVESTIGATION.ACCORDINGLY, THIS INVESTIGATION IS CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT A SAFETY-RELATED DEFECT DOES NOT EXIST.THE AGENCY WILL TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.