IllustrationI FIRST NOTICED CRACKS IN THE PLASTIC IN SEVERAL PLACES RUNNING VERTICALLY ON BOTH SIDES OF MY DASHBOARD AND IT LOOKED LIKE IT WAS WET. IT WAS VERY STICKY TO THE TOUCH AND LEFT A RESIDUE ON MY FINGERS LIKE PINE TAR. MY CAR IS NOT SITTING IN THE HOT SUN AND IS GARAGED FOR THE MOST PART UNLESS GOING TO THE STORE. *TR
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
What owners actually said
287 reportsMY ELECTRICAL WIRING HAS A HUGE ISSUE. I AM CONFIDENT THIS HAS TO BE A HAZARD OF SOME KIND! A FEW YEARS AGO I STARTED HAVING ISSUES LOCKING/UNLOCKING MY CAR DOORS WITH THE KEY FOB. ONLY ONE OR TWO DOORS WOULD LOCK/UNLOCK ON COMMAND. AFTER RESEARCH I FOUND THIS TO BE A POSSIBLE ACTUATOR PROBLEM. LEXUS ESTIMATED THE COST TO BE $70…
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MY ELECTRICAL WIRING HAS A HUGE ISSUE. I AM CONFIDENT THIS HAS TO BE A HAZARD OF SOME KIND! A FEW YEARS AGO I STARTED HAVING ISSUES LOCKING/UNLOCKING MY CAR DOORS WITH THE KEY FOB. ONLY ONE OR TWO DOORS WOULD LOCK/UNLOCK ON COMMAND. AFTER RESEARCH I FOUND THIS TO BE A POSSIBLE ACTUATOR PROBLEM. LEXUS ESTIMATED THE COST TO BE $700/ACTUATOR (PER DOOR). WITHOUT HAVING THE ACTUATORS FIXED JUST YET, A COUPLE OF DAYS PASSED AND I NOTICED MY TAIL LIGHT WENT OUT. THE NEXT DAY A HEADLIGHT WENT OUT. I VISITED OUR LOCAL ADVANCED AUTO WHERE THEY REPLACED MY HEADLIGHT AND ONLY 'WIGGLE' REAR TAILLIGHT RESULTING IN IT TO WORK AGAIN. UPON LEAVING, I NOTICED THAT ALL OF MY DOOR LOCKS WORKED AGAIN! THIS BULB ADJUSTMENT EFFECTED THE OTHER ELECTRICAL ITEMS. MANY MONTHS LATER, I HAVE REPLACED A HANDFUL OF BULBS AND HAD TO 'WIGGLE' TOO MANY BULBS TO COUNT. THIS EXACT ISSUE HAS NOW SUBSIDED BUT I AM STILL SEEING OTHER ELECTRICAL ISSUES THROUGHOUT. RIGHT NOW, MY WINDOW MOTOR GRINDS ON PAST THE WINDOW BEING CLOSED AND MY SUNROOF WILL NOT WORK. *TR
MY 2004 LEXUS RX330'S EXTERIOR LIGHTS HAVE ALWAYS LEAKED. FRONT AND BACK BUT THE FRONT IS THE WORST. THIS NOW TO THE POINT THAT THE HEADLIGHTS ARE SO POOR THAT I HAVE BEEN ADVISED NOT TO DRIVE AT NIGHT. LEXUS WILL NOT CORRECT THIS ISSUE UNLESS YOU PAY THEM A WHOPPING $400 + PER UNIT! NO THANK YOU! I SOON HOPE TO PURCHASE SOMETHI…
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MY 2004 LEXUS RX330'S EXTERIOR LIGHTS HAVE ALWAYS LEAKED. FRONT AND BACK BUT THE FRONT IS THE WORST. THIS NOW TO THE POINT THAT THE HEADLIGHTS ARE SO POOR THAT I HAVE BEEN ADVISED NOT TO DRIVE AT NIGHT. LEXUS WILL NOT CORRECT THIS ISSUE UNLESS YOU PAY THEM A WHOPPING $400 + PER UNIT! NO THANK YOU! I SOON HOPE TO PURCHASE SOMETHING NOT MADE BY LEXUS! *TR
MY 2004 LEXUS RX330'S DASHBOARD HAS BEEN CRACKING SINCE THE DAY I PURCHASED IT. THE VEHICLE ORIGINATED IN FLORIDA AND NOW IN SOUTH CAROLINA. THE HEAT AND HUMIDITY HAVE DESTROYED THIS CAR! WHEN I PURCHASED IT USED, THE DASHBOARD HAD A COUPLE OF CRACKS IN IT SO I ASSIDUOUSLY USED A WINDOW SHIELD EVERY SINGLE TIME I GET OUT OF THE…
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MY 2004 LEXUS RX330'S DASHBOARD HAS BEEN CRACKING SINCE THE DAY I PURCHASED IT. THE VEHICLE ORIGINATED IN FLORIDA AND NOW IN SOUTH CAROLINA. THE HEAT AND HUMIDITY HAVE DESTROYED THIS CAR! WHEN I PURCHASED IT USED, THE DASHBOARD HAD A COUPLE OF CRACKS IN IT SO I ASSIDUOUSLY USED A WINDOW SHIELD EVERY SINGLE TIME I GET OUT OF THE VEHICLE. THE TASK IS SUCH A HABIT THAT I EVEN DO THIS UNNECESSARILY AT NIGHT! THE HEAT INSIDE THE CAR STILL COMPLETELY MELTS THE DASH TO NO AVAIL. SOMETIMES WHEN I TURN THE KEY, MY FINGERNAIL WILL ACCIDENTALLY TOUCH THE DASH MATERIAL (IT WRAPS SO IT SURROUNDS THE IGNITION) AND THE MATERIAL WILL COME OFF UNDER MY FINGERNAIL. CRANKING YOUR VEHICLE IS NOT A FORCEFUL ENDEAVOR EITHER, IT IS GENTLE AND I AM VERY CONSCIOUS NOT TO TOUCH THE DASHBOARD MATERIAL BECAUSE OF THIS MELTING ISSUE. ONE WOULD THINK THAT A BRAND SUCH AS LEXUS WOULD BE EMBARRASSED TO HAVE THESE VEHICLES SEEN IN PUBLIC! *TR
THE DASHBOARD ON MY 04 LEXUS RX 330 HAS BE DISINTEGRATING BEFORE MY EYES. IT IS MELTING AND CRACKING GETTING WORST EVERYDAY. *TR
MY 2004 LEXUS RX 330 DASHBOARD COVER IS ALL CRACKED UP IN ALL DIRECTIONS AND IS VERY STICKY DUE TO THE HOT AND HUMID FLORIDA WEATHER. THE DEALER IS REFUSING TO FIX THIS ISSUE. *TR
MY CAR HAS A PROBLEM WITH EXCESS MOISTURE AND CONDENSATION IN THE HEADLIGHT HOUSING. IT HAS CONTINUED TO WORSEN FOR THE PAST SEVERAL YEARS. LEXUS REFUSED TO RECOGNIZE THIS PROBLEM AS ITS RESPONSIBILITY UNTIL DECEMBER, 2013 WHEN IT ISSUED A WARRANTY ENHANCEMENT TO ALL LEXUS RX OWNERS THAT HAD THIS PROBLEM. THAT NOTICE INDICATE…
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MY CAR HAS A PROBLEM WITH EXCESS MOISTURE AND CONDENSATION IN THE HEADLIGHT HOUSING. IT HAS CONTINUED TO WORSEN FOR THE PAST SEVERAL YEARS. LEXUS REFUSED TO RECOGNIZE THIS PROBLEM AS ITS RESPONSIBILITY UNTIL DECEMBER, 2013 WHEN IT ISSUED A WARRANTY ENHANCEMENT TO ALL LEXUS RX OWNERS THAT HAD THIS PROBLEM. THAT NOTICE INDICATED THAT PARTS WERE BEING MANUFACTURED AND WOULD BE AVAILABLE BY MAY, 2014. MY CAR WAS INSPECTED AND WAS ADVISED THE REPAIR WOULD BE MADE AS SOON AS THE PARTS WERE AVAILABLE. IN EARLY JULY I CONTACTED MY DEALER (CHERRY HILL LEXUS) WHO REFERRED ME TO LEXUS CORPORATE. I WAS ADVISED BY LEXUS CORPORATE THAT PARTS WOULD BE AVAILABLE TO FIX THE PROBLEM BY THE END OF JULY. NOW, 8 MONTHS AFTER THE WARRANTY ENHANCEMENT WAS ANNOUNCED, PARTS ARE STILL NOT AVAILABLE TO FIX THE PROBLEM. THE DEALER SAYS CONTACT LEXUS AND LEXUS SAYS CONTACT THE DEALER; THE RUN-A-ROUND IS GETTING A LITTLE OLD. THE SERIOUS NATURE OF THIS PROBLEM WAS RECOGNIZED BY A US FEDERAL JUDGE IN HO V. TOYOTA, THE COURT SAID IN THE INSTANT MATTER, THE COURT FINDS THAT PLAINTIFFS SUCCESSFULLY SHOWED THAT THE ALLEGED DEFECT POSED A GENUINE SAFETY RISK BECAUSE A HEADLAMP FLICKERING OR GOING OUT AT NIGHT OR IN INCLEMENT WEATHER COULD PUT THE CAR'S DRIVER IN DANGER. A REASONABLE CONSUMER WOULD CONSIDER THIS RISK MATERIAL BECAUSE OF THE INHERENT RISKS OF PHYSICAL INJURY IN THE EVENT OF A HEADLAMP-RELATED ACCIDENT, OR THE COSTS ASSOCIATED WITH CONTINUALLY REPAIRING PROBLEMATIC HEADLAMPS. LEXUSES ENHANCED WARRANTY FOLLOWED THE ISSUANCE OF THE COURT'S ABOVE OPINION. MY CAR HAS THE SAME TYPE OF PROBLEM AS DISCUSSED IN THE OPINION. ANY HELP YOU COULD PROVIDE IN HAVING THIS NEEDED REPAIR WOULD BE APPRECIATED. *TR
LEAKING POWER STEERING RACK ASSEMBLY. SEEMS TO BE A VERY COMMON PROBLEM WITH THESE RX330'S. ADVISED I NEED A NEW RACK & PINION ASSEMBLY. LEXUS NEEDS A RECALL FOR THIS ISSUE, TOO MANY COMPLAINTS! AND IN NOVEMBER 2011 TOYOTA RECALL 500K CALLS DOING TO POWER STEERING PROBLEM AND RX330 WAS ON THERE BUT NEVER RECEIVED ANY INFORMAT…
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LEAKING POWER STEERING RACK ASSEMBLY. SEEMS TO BE A VERY COMMON PROBLEM WITH THESE RX330'S. ADVISED I NEED A NEW RACK & PINION ASSEMBLY. LEXUS NEEDS A RECALL FOR THIS ISSUE, TOO MANY COMPLAINTS! AND IN NOVEMBER 2011 TOYOTA RECALL 500K CALLS DOING TO POWER STEERING PROBLEM AND RX330 WAS ON THERE BUT NEVER RECEIVED ANY INFORMATION ON IT. LOOK UP RECALL ON LEXUS SITE AND PUT MY VIN AND NOTHING ABOUT IT. BUT READING THE LEXUS FORUM AND SO MANY OTHER PEOPLE HAVING SAME PROBLEMS. LEXUS NEEDS TO LOOK INTO THIS ISSUE. IT SO EXPENSIVE FOR PEOPLE TO GET FIX. IF IT HAPPEN TO SO MANY CARS THEN IT A PROBLEM, LEXUS NEEDS TO DO A RECALL ON THIS. TO MANY PEOPLE HAVING THIS PROBLEM. *TR
THE LEXUS DEVELOPED A SERIES OF CRACKS RUNNING THROUGHOUT THE PLASTIC DASHBOARD. THE CRACKS WORSENED OVER TIME. *JS
MY STEERING STARTED GETTING STIFF AND MAKING A GRINDING SOUND WITHOUT WARNING. IT WOULD THEN DISAPPEAR AFTER DRIVING FOR ABOUT 5 MINUTES. I NOTICED THIS SEEMS TO BE A COMMON PROBLEM WITH THE VEHICLE AT THE 90,000 MARK. I BOUGHT A LEXUS BECAUSE I THOUGHT THE VEHICLE WOULD BE SOLID BUT IT SEEMS LIKE EVERYTHING IS STARTING TO GO…
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MY STEERING STARTED GETTING STIFF AND MAKING A GRINDING SOUND WITHOUT WARNING. IT WOULD THEN DISAPPEAR AFTER DRIVING FOR ABOUT 5 MINUTES. I NOTICED THIS SEEMS TO BE A COMMON PROBLEM WITH THE VEHICLE AT THE 90,000 MARK. I BOUGHT A LEXUS BECAUSE I THOUGHT THE VEHICLE WOULD BE SOLID BUT IT SEEMS LIKE EVERYTHING IS STARTING TO GO. I HAD TO REPLACE THE SUNROOF, AIR CONDITIONING PUMP, RADIATOR AND TRANSMISSION AFTER HITTING 80,000. I DON'T WANT TO PUT ANY MORE $$$ INTO THE CAR AT THIS POINT BECAUSE IT DOESN'T SEEM WORTH. ONE PROBLEM AFTER THE NEXT. *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.