NHTSA owner reports · September 18, 2026 snapshot.
Vehicle Speed Control complaints
55 reportsClear category filterMileage unknown · Jun 7, 2014
Vehicle Speed Control
I OWN A 2007 TAURUS SE WITH ABOUT 90,000 MILES. THE CRUISE CONTROL STOPPED WORKING LAST WEEK AND I TURNED IT OFF. ON AT LEAST FOUR OCCASIONS IN THE LAST WEEK, SINCE THEN I HAVE HAD UNEXPECTED, UNCONTROLLED ACCELERATION WHILE DRIVING THAT COULD EASILY RESULTED IN AN ACCIDENT. WHEN THE ACCELERATION HAPPENED , I GOT THE CA…
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I OWN A 2007 TAURUS SE WITH ABOUT 90,000 MILES. THE CRUISE CONTROL STOPPED WORKING LAST WEEK AND I TURNED IT OFF. ON AT LEAST FOUR OCCASIONS IN THE LAST WEEK, SINCE THEN I HAVE HAD UNEXPECTED, UNCONTROLLED ACCELERATION WHILE DRIVING THAT COULD EASILY RESULTED IN AN ACCIDENT. WHEN THE ACCELERATION HAPPENED , I GOT THE CAR OFF THE ROAD STEPPED ON THE BRAKE AS HARD AS I COULD, THE CAR RAN UP TO 3TO 4000 RPM BEFORE I COULD SHIFT TO NEUTRAL AND TURN OFF THE IGNITION AFTER THE INCIDENT YESTERDAY AFTERNOON ; I TOOK THE CAR IN TO ECKENROD FORD IN CULLMAN, ALABAMA. THEY GAVE ME A LOANER CAR WHILE THEY ARE FIXING MINE. I SEE THAT YOU HAVE HAD SEVERAL COMPLAINTS OF THE SAME THING HAPPENING IN THIS YEAR AND MODEL AND RECOMMEND A RECALL OR AT LEAST A SERVICE BULLETIN, TO DEAL WITH THIS PROBLEM. IN RESEARCHING THIS PROBLEM A LOSE CRUISE CONTROL CABLE MAY BE CAUSING THIS PROBLEM. THE PROBLEM IS DANGEROUS AND DISCONCERTING AND SHOULD BE ADDRESSED. *TR
NHTSA ODI #10596858
53,000 miles · Apr 28, 2014
Vehicle Speed Control
ON TWO OCCASIONS I WAS TRAVELING APPROX. 60 MPH ON THE FREEWAY WHEN MY CAR SUDDENLY ACCELERATED TO 80 MPH. THE FIRST TIME I TOOK MY FOOT OFF THE GAS AND THE CAR SLOWED TO AT 50 MPH AND CONTINUED THAT WAY FOR A COUPLE MINUTES, THEN RETURNED TO NORMAL. THE SECOND TIME I HAD TO PUSH THE BRAKE PEDAL VERY HARD WITH BOTH FEET TO MAKE …
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ON TWO OCCASIONS I WAS TRAVELING APPROX. 60 MPH ON THE FREEWAY WHEN MY CAR SUDDENLY ACCELERATED TO 80 MPH. THE FIRST TIME I TOOK MY FOOT OFF THE GAS AND THE CAR SLOWED TO AT 50 MPH AND CONTINUED THAT WAY FOR A COUPLE MINUTES, THEN RETURNED TO NORMAL. THE SECOND TIME I HAD TO PUSH THE BRAKE PEDAL VERY HARD WITH BOTH FEET TO MAKE IT SLOW DOWN. I WAS ABLE TO GET OFF THE FREEWAY, BUT THERE WAS I RED LIGHT AND I SLID THROUGH THE LIGHT TRYING TO STOP MY CAR. I WAS FORTUNATE NO OTHER CAR WAS COMING. I PUT THE CAR IN NEUTRAL, AND THERE WAS A VERY HARD KICK AND THE RPM'S WHERE STILL VERY HIGH. THEN IT JUST STOPPED RACING AND WENT BACK TO NORMAL. *JS
NHTSA ODI #10585330
Mileage unknown · Apr 14, 2014
Vehicle Speed ControlCrash
TL* THE CONTACT OWNS A 2007 FORD TAURUS. THE CONTACT STATED THAT AFTER STOPPING THE VEHICLE AND SHIFTING INTO PARK, THE VEHICLE SUDDENLY ACCELERATED AND TRAVELED OVER THE SIDEWALK UNTIL CRASHING INTO A SIGN. THE CONTACT WAS NOT INJURED. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. TH…
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TL* THE CONTACT OWNS A 2007 FORD TAURUS. THE CONTACT STATED THAT AFTER STOPPING THE VEHICLE AND SHIFTING INTO PARK, THE VEHICLE SUDDENLY ACCELERATED AND TRAVELED OVER THE SIDEWALK UNTIL CRASHING INTO A SIGN. THE CONTACT WAS NOT INJURED. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE VIN WAS NOT AVAILABLE. THE FAILURE MILEAGE WAS UNKNOWN AND THE CURRENT MILEAGE WAS 69,000.
NHTSA ODI #10579648
86,006 miles · Apr 13, 2014
Vehicle Speed Control
WE TOOK A TRIP ON 04/01/2014 AND ON THE RETURN HOME. THE CRUISE CONTROL FAILED TO WORK. AT THAT POINT, IT WAS NOT A BIG CONCERN UNTIL YESTERDAY WHEN WE WERE AT A LIGHT BEHIND A FORD F-150 PICKUP TRUCK. CAR ACCELERATED TO ABOUT 4000 RPM. MY FOOT WAS ALREADY ON THE BRAKE. I HAD TO PUSH THE BRAKE TO THE FLOOR TO KEEP FROM HITTING T…
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WE TOOK A TRIP ON 04/01/2014 AND ON THE RETURN HOME. THE CRUISE CONTROL FAILED TO WORK. AT THAT POINT, IT WAS NOT A BIG CONCERN UNTIL YESTERDAY WHEN WE WERE AT A LIGHT BEHIND A FORD F-150 PICKUP TRUCK. CAR ACCELERATED TO ABOUT 4000 RPM. MY FOOT WAS ALREADY ON THE BRAKE. I HAD TO PUSH THE BRAKE TO THE FLOOR TO KEEP FROM HITTING THE TRUCK IN FRONT OF ME. W HEN WE GOT THRU THE INTERSECTION, I WAS ABLE GET THE RPMS DOWN BY HIT THE GAS PETAL A COUPLE TIME. I STARTED TO CHECK ONLINE TO SEE IF THIS WAS A PROBLEM, I LEARN THAT MY FORD TAURUS WAS UNDER INVESTIGATION FOR CRUISE CONTROL/ ACCELERATOR ISSUES. HAS FORD ADDRESS THIS ISSUE BEFORE SOMEONE GETS INJURIED OR KILLED. I WILL NOT LET MY FAMILY IN THE CAR UNTIL THE PROBLEM IS FIXED. *JS
NHTSA ODI #10579460
60,000 miles · Mar 11, 2014
Vehicle Speed Control
TL* THE CONTACT OWNS A 2007 FORD TAURUS. THE CONTACT STATED THAT WHILE HE APPROACHED AN INTERSECTION AND STARTED TO DECELERATE WITH THE BRAKES APPLIED, THE VEHICLE ACCELERATED TO 60 MPH. AS THE VEHICLE CONTINUED TO ACCELERATE, THE CONTACT WAS ABLE TO TURN INTO AN OPENED AREA, SHIFT INTO PARK AND TURN THE ENGINE OFF. THE VEHICLE …
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TL* THE CONTACT OWNS A 2007 FORD TAURUS. THE CONTACT STATED THAT WHILE HE APPROACHED AN INTERSECTION AND STARTED TO DECELERATE WITH THE BRAKES APPLIED, THE VEHICLE ACCELERATED TO 60 MPH. AS THE VEHICLE CONTINUED TO ACCELERATE, THE CONTACT WAS ABLE TO TURN INTO AN OPENED AREA, SHIFT INTO PARK AND TURN THE ENGINE OFF. THE VEHICLE WAS TAKEN TO A MECHANIC, WHO PERFORMED AN INSPECTION AND ADVISED THAT THE CRUISE CONTROL LINKAGE HAD BECOME STUCK. THE CRUISE CONTROL WAS DISCONNECTED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 60,000 AND THE CURRENT MILEAGE WAS 70,000.
NHTSA ODI #10568352
101,684 miles · Oct 18, 2013
Vehicle Speed Control
TL* THE CONTACT OWNS A 2007 FORD TAURUS. THE CONTACT STATED THAT WHILE DRIVING 25 MPH, THE CRUISE CONTROL COMMAND WAS TURNED ON AND THE VEHICLE ACCELERATED AND WOULD NOT STOP OR COME OUT OF CRUISE CONTROL UNTIL THE CONTACT SHIFTED INTO PARK AND TURNED THE VEHICLE OFF. THE VEHICLE WAS TAKEN TO A DEALER WHERE THE MECHANIC STATED T…
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TL* THE CONTACT OWNS A 2007 FORD TAURUS. THE CONTACT STATED THAT WHILE DRIVING 25 MPH, THE CRUISE CONTROL COMMAND WAS TURNED ON AND THE VEHICLE ACCELERATED AND WOULD NOT STOP OR COME OUT OF CRUISE CONTROL UNTIL THE CONTACT SHIFTED INTO PARK AND TURNED THE VEHICLE OFF. THE VEHICLE WAS TAKEN TO A DEALER WHERE THE MECHANIC STATED THAT THE CRUISE CONTROL CABLE, THROTTLE CABLE AND THE THROTTLE BODY HAD TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED. THE FAILURE MILEAGE WAS 101,684...UPDATED 11-14-13 *BF THE CONSUMER STATED THE VEHICLE CONTINUED TO ACCELERATE EVEN IN PARK. THE CRUISE CONTROL WOULD NOT TURN OFF. WHEN THE CONSUMER STARTED THE VEHICLE, IT ACCELERATED AT A HIGH RATE OF SPEED. SHE PUSHED THE ACCELERATOR PEDAL ALL THE WAY DOWN, FAST AND IT WENT TO NORMAL IDLE. THE VEHICLE ACCELERATED ON ITS OWN ON TWO PRIOR OCCASIONS.
NHTSA ODI #10548477
105,000 miles · Jul 2, 2013
Vehicle Speed Control
IMPORTANT TO NOTE IS THAT A WEEK BEFORE THE FIRST INCIDENT THE CRUISE CONTROL STOPPED WORKING IN THAT IT WOULD TURN ON BUT I COULD NOT SET A SPEED ANYMORE. I DECIDED I WOULD HAVE THAT FIXED AT MY NEXT SCHEDULED SERVICING. AFTER A WEEK WHEN DRIVING AT ABOUT 40MPH THE CAR CONTINUED TO ACCELERATE AFTER I RELEASED THE THROTTLE, THE …
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IMPORTANT TO NOTE IS THAT A WEEK BEFORE THE FIRST INCIDENT THE CRUISE CONTROL STOPPED WORKING IN THAT IT WOULD TURN ON BUT I COULD NOT SET A SPEED ANYMORE. I DECIDED I WOULD HAVE THAT FIXED AT MY NEXT SCHEDULED SERVICING. AFTER A WEEK WHEN DRIVING AT ABOUT 40MPH THE CAR CONTINUED TO ACCELERATE AFTER I RELEASED THE THROTTLE, THE CRUISE CONTROL WAS NOT TURNED ON IT WAS STILL BROKEN. BRAKING A LITTLE TO STOP THE FORWARD MOMENTUM AND TAPPING THE THROTTLE RESOLVED THE ISSUE AT LEAST TEMPORARILY. AT THE TIME I THOUGHT IT MUST BE THE MAT SNAGGING IT. HOWEVER, ONLY A FEW DAYS LATER THE THROTTLE GOT STUCK AGAIN. AGAIN AT ABOUT 40MPH THE CAR CONTINUED TO ACCELERATE EVEN AFTER RELEASING THE THROTTLE. SINCE TAPPING THE THROTTLE DIDN'T WORK IMMEDIATELY I SHIFTED THE CAR INTO NEUTRAL AND THE ENGINE WAS RAGING AT 4000 RPM IN NEUTRAL. THIS WAS A VERY DANGEROUS SITUATION SINCE I WAS APPROACHING A BUSY INTERSECTION WHEN THIS HAPPENED. WITH THE CAR IN NEUTRAL I COULD STOP, THEN I SLAMMED THE THROTTLE A COUPLE OF TIMES AND IT RELEASED. I TOOK THE CAR TO THE DEALERSHIP THE NEXT DAY AND THEY REPLACED THE CRUISE CONTROL ASSEMBLY, WHICH FIXED THE PROBLEM. DOING SOME RESEARCH ONLINE SHOWED THAT FOR CERTAIN MAKES, WHEN THE CRUISE CONTROL CABLE GET LOOSE AND MOVES AROUND A LITTLE IT CAN INTERFERE WITH THE THROTTLE, WHICH I BELIEVE IS A SERIOUS PROBLEM THAT FORD SHOULD ADDRESS. *TR
NHTSA ODI #10522787
70,000 miles · Jul 1, 2013
Vehicle Speed Control
WHEN WET OR REALLY COLD OUTSIDE, GAS PEDAL STICKS AND YOU PUSH HARD ON IT AND IT EVENTUALLY GOES BUT SHOOTS YOU OUT INTO TRAFFIC OR FASTER THEN YOU WANT IT TO GO. RIGHT AFTER YOU PUT INTO DRIVE OR IF YOU STOP AT A STOP LIGHT OR SIGN. YOU CAN STOP, BUT THEN CAN'T GET IT TO GO. SCARY CAUSE IF YOU ARE IN STOP AND GO TRAFFIC AND …
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WHEN WET OR REALLY COLD OUTSIDE, GAS PEDAL STICKS AND YOU PUSH HARD ON IT AND IT EVENTUALLY GOES BUT SHOOTS YOU OUT INTO TRAFFIC OR FASTER THEN YOU WANT IT TO GO. RIGHT AFTER YOU PUT INTO DRIVE OR IF YOU STOP AT A STOP LIGHT OR SIGN. YOU CAN STOP, BUT THEN CAN'T GET IT TO GO. SCARY CAUSE IF YOU ARE IN STOP AND GO TRAFFIC AND IT STICKS MAKES YOU SHOOT FAST SO YOU HAVE TO REALLY STAY BACK AND THEN CARS CUT IN FRONT AND IT HAPPENS. ALMOST REAR ENDED A CAR SEVERAL DIFFERENT OCCASIONS. *TR
NHTSA ODI #10522690
103,000 miles · Apr 23, 2013
Vehicle Speed Control
WHILE DRIVING 25 MPH TOOK FOOT OFF GAS TO SLOW DOWN AND CAR ACCELERATED ON ITS OWN. TAPPING ON GAS WOULD SLOW IT DOWN BUT DIDN'T STOP IT. PULLED IN PARKING LOT AND PUT VEHICLE IN PARK. RPM'S RACED TO OVER 3000 WITHOUT ME HAVING FOOT ON GAS. TURNED OFF AND STARTED UP AND RPMS STILL RACING. WHILE IN PARKING LOT ATTEMPTED TO DRIVE …
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WHILE DRIVING 25 MPH TOOK FOOT OFF GAS TO SLOW DOWN AND CAR ACCELERATED ON ITS OWN. TAPPING ON GAS WOULD SLOW IT DOWN BUT DIDN'T STOP IT. PULLED IN PARKING LOT AND PUT VEHICLE IN PARK. RPM'S RACED TO OVER 3000 WITHOUT ME HAVING FOOT ON GAS. TURNED OFF AND STARTED UP AND RPMS STILL RACING. WHILE IN PARKING LOT ATTEMPTED TO DRIVE AND VEHICLE WOULD GO WITHOUT MY FOOT ON GAS. TOOK TO DEALER ON MONDAY AND HAPPENED ON WAY BUT OF COURSE NOTHING WHEN GOT TO DEALER. ON 4/22/13 HAPPENED AGAIN WHILE DRIVING 35 MPH COULD FEEL THE GAS PEDAL ENGAGE AND CAR ACCELERATED ON OWN. AGAIN PULLED IN PARKING LOT AND PUT IN PARK. RPMS ACCELERATED. TURNED ON AND OFF THIS LASTED FOR 15 MINUTES. THEN COULD FEEL THE GAS PEDAL DISENGAGE. ABOUT 1 HOUR LATER HAPPENED AGAIN WHILE DRIVING. WAS IN DRIVE THROUGH LANE AND EVEN THOUGH FOOT ON BRAKE YOU COULD FEEL CAR TRY TO PUSH AGAINST IT. HAD PASSENGER IN CAR WITH ME WHO COULD EXPERIENCE IT AS WELL. I FEEL VERY UNSAFE IN THIS CAR AND DISAPPOINTED THAT FORD DEALER SAYS THEY KNOW OF NO FIX FOR THIS PROBLEM EVEN THOUGH ITS BEEN REPORTED FOR YEARS. *TR
NHTSA ODI #10509223
97,000 miles · Apr 19, 2013
Fuel/propulsion SystemVehicle Speed Control
CRUISE CONTROL STOPPED WORKING - CHECKED CABLE AT THROTTLE AND IT HAD COME UNATTACHED-REATTACHED CABLE AND ALL WAS FINE FOR A DAY. THEN CAR STARTED TO HOLD SPEED WHEN CRUISE CONTROL WAS NOT ON. WHEN BRAKING, FELT LIKE GAS PEDAL WAS STILL ENGAGED. PUT CAR INTO NEUTRAL AND RPMS WENT UP. TAPPED GAS PEDAL AND ALL RETURNED TO NOR…
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CRUISE CONTROL STOPPED WORKING - CHECKED CABLE AT THROTTLE AND IT HAD COME UNATTACHED-REATTACHED CABLE AND ALL WAS FINE FOR A DAY. THEN CAR STARTED TO HOLD SPEED WHEN CRUISE CONTROL WAS NOT ON. WHEN BRAKING, FELT LIKE GAS PEDAL WAS STILL ENGAGED. PUT CAR INTO NEUTRAL AND RPMS WENT UP. TAPPED GAS PEDAL AND ALL RETURNED TO NORMAL. PUT CAR BACK INTO DRIVE AND IT WAS FINE AGAIN FOR A FEW MINUTES, THEN SAME PROBLEM HAPPENED AGAIN. CAR WILL HOLD RPMS AS IF GAS PEDAL IS STILL ENGAGED EVEN WHEN MY FOOT IS NO LONGER ON THE GAS. HAVE TO DEPRESS GAS PEDAL HARD AND FAST TO GET IT TO DISENGAGE AGAIN. BEGINNING TO HAPPEN MORE REGULARLY. HAVE TO PUT THE VEHICLE IN NEUTRAL OFTEN TO COME TO A SAFE STOP. CRUISE CONTROL CABLE KEEPS DETACHING FROM ITS HOUSING AND MAKES THE THROTTLE STICK PARTIALLY OPEN. *TR
NHTSA ODI #10508779
NHTSA investigations
1PE08060 · Tire Valve Cracking
Opened Oct 14, 2008 · Closed Apr 9, 2009
Status: closed (inferred from source dates) · Tires:valve
ON OCTOBER 14, 2008, ODI OPENED PE08-060 TO INVESTIGATE ALLEGATIONS OF CRACKED AND LEAKING SNAP-IN TIRE VALVES IN MODEL YEAR (MY) 2007 VEHICLES MANUFACTURED BY FORD MOTOR COMPANY.THE VALVES WERE SUPPLIED TO FORD BY TOPSEAL AUTO-PARTS, A SUBSIDIARY OF THE SHANGHAI BAOLONG AUTOMOTIVE CORPORATION IN CHINA.VALVES MADE BY TOPSEAL FOR AFTERMARKET SALE WERE THE SUBJECT OF TWO RECENT SAFETY RECALLS BY TECH INTERNATIONAL (08T-018) AND DILL AIR CONTROLS (08T-028), THE LATTER OF WHICH WAS INVESTIGATED BY ODI IN PE08-036 AND EA08-022.THE DEFECT CONDITIONS ADDRESSED BY THE AFTERMARKET TIRE VALVE RECALLS BOTH INVOLVED INADEQUATE RESISTANCE TO OZONE CRACKING DUE TO ISSUES WITH THE SUPPLY OF ANTI-OZONANT CHEMICALS TO TOPSEAL FOR A PERIOD FROM JULY TO MID-NOVEMBER 2006.THE AFTERMARKET VALVES WERE COMPOUNDED WITH A BLEND OF EPDM AND NATURAL RUBBER, USING A RELATIVELY LOW PERCENTAGE OF EPDM (EPDM PROVIDES INHERENT RESISTANCE TO OZONE CRACKING).HENCE, THE NEED FOR ANTI-OZONANT CHEMICALS AND THE PROBLEMS WITH CRACKING WHEN THOSE CHEMICALS WERE MISSING OR OUT OF SPECIFICATION IN SOME LOTS OF VALVES.BOTH RECALL CAMPAIGNS INVOLVED INSPECTION PROGRAMS TO IDENTIFY AND REPLACE VALVES WITH VISIBLE SURFACE CRACKING.ALTHOUGH THE TOPSEAL VALVES SUPPLIED TO FORD ALSO APPEAR TO HAVE BEEN AFFECTED BY THE ANTI-OZONANT SUPPLY ISSUES IN MID TO LATE-2006, FORD INDICATED THAT ITS VALVES WERE MADE AT A DIFFERENT TOPSEAL PRODUCTION LINE AND WERE COMPOUNDED WITH A HIGHER PERCENTAGE OF EPDM RUBBER TO MEET MORE STRINGENT SPECIFICATIONS FROM FORD.ODI'S ANALYSIS OF COMPLAINT AND WARRANTY DATA PROVIDED BY FORD SHOWED THAT PROBLEMS WITH CRACKED TIRE VALVES WERE SIGNIFICANTLY HIGHER FOR MY 2007 VEHICLES PRODUCED FROM DECEMBER 2006 THROUGH MARCH 2007.FORD RESPONDED BY IMPLEMENTING CHANGES IN ITS MATERIAL SPECIFICATIONS FOR SNAP-IN RUBBER TIRE VALVES AND ALSO INCREASING THE QUALITY AND ACCEPTANCE STANDARDS FOR VALVES IMPORTED FOR USE IN ITS VEHICLES.WHILE THE COMPLAINT AND WARRANTY CLAIM RATES ARE ELEVATED FOR SUBJECT VEHICLES PRODUCED FROM DECEMBER 2006 THROUGH MARCH 2007, THE RATES OF LEAKING VALVES ARE WELL BELOW ONE PERCENT OF PRODUCTION FOR EACH OF THE PEAK MONTHS FOR ALL OF THE AFFECTED MODELS.A SUBSTANTIAL MAJORITY OF THE SUBJECT VEHICLES ARE EQUIPPED WITH TIRE PRESSURE MONITORING SYSTEMS (TPMS) WHICH WARN THE DRIVER WHEN ANY TIRE PRESSURES DROPS BELOW 25 PERCENT OF RECOMMENDED INFLATION PRESSURE. AS OUTLINED IN A LETTER TO ODI DATED APRIL 6, 2009, FORD HAS AGREED TO SEND LETTERS TO OWNERS OF CERTAIN MY 2007 AND 2008 FORD, LINCOLN AND MERCURY VEHICLES TO PROVIDE INFORMATION ABOUT THE CRACKING CONCERN. LETTERS WILL BE SENT TO OWNERS OF VEHICLES BUILT FROM NOVEMBER 2006 THROUGH MAY 2007.OWNERS CAN OPT FOR A FREE DEALER INSPECTION.VALVES EXHIBITING SURFACE CRACKS OR AIR LEAKAGE RELATED TO OZONE ATTACK WILL BE REPLACED BY FORD UNDER ITS NORMAL WARRANTY TERMS.FORD EXPECTS TO SEND THE LETTER BY APPROXIMATELY MID-MAY 2009. BASED ON THE USE OF TPMS IN THE MAJORITY OF SUBJECT VEHICLES AND THE RELATIVELY LOW RATES OF REPAIRS ASSOCIATED WITH LEAKING VALVES AND RESULTANT TIRE DAMAGE, ODI BELIEVES THAT THE ACTIONS FORD HAS AGREED TO TAKE WILL PROVIDE EFFECTIVE AND EXPEDITIOUS RESOLUTION FOR VEHICLES THAT WERE BUILT DURING THE PERIOD WHEN VALVES WITH INADEQUATE RESISTANCE TO OZONE CRACKING WERE MOST LIKELY TO HAVE BEEN USED IN VEHICLE PRODUCTION.FURTHER INVESTIGATION OF THIS MATTER WOULD NOT BE AN EFFICIENT ALLOCATION OF AGENCY RESOURCES.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 CONTINUE TO