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2008 Ford F-150

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2008 Ford F-150 do not stand out strongly from the model-year median of 676.

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When problems were reported

Mileage at the reported incident

320 reports with mileage · 49 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.

  • Engine. Review the 53 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Steering. Review the 53 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Power Train. Review the 50 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

39 crash reports12 fire reports28 injury reports

Power Train complaints

50 reports
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120 miles · Jun 10, 2010
Power TrainSeat BeltsService Brakes, Hydraulic

BRAKES FAILED ON 2 SEPARATE OCCASIONS FOR NO APPARENT REASON. RAN THRU 2 DIFFERENT INTERSECTIONS ...NO WET ROADS...NO WEATHER CONDITIONS...JUST FAILED TO STOP VEHICLE. *TR

NHTSA ODI #10335596

1,000 miles · Feb 16, 2010
Power TrainVehicle Speed Control

THE ACCELERATOR AND BRAKE ARE SO CLOSE TOGETHER ON MY 2008 FORD F150 THAT I HAVE ON OCCASION ACCIDENTALLY PRESSED BOTH THE ACCELERATOR AND BRAKE PEDALS AT THE SAME TIME WHILE BRAKING. THE FIRST TIME IT HAPPENED I DID NOT KNOW WHAT WAS HAPPENING. THE ENGINE WAS REVVING UP AS I WAS APPLYING THE BRAKE, SO I APPLIED THE BRAKE …

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THE ACCELERATOR AND BRAKE ARE SO CLOSE TOGETHER ON MY 2008 FORD F150 THAT I HAVE ON OCCASION ACCIDENTALLY PRESSED BOTH THE ACCELERATOR AND BRAKE PEDALS AT THE SAME TIME WHILE BRAKING. THE FIRST TIME IT HAPPENED I DID NOT KNOW WHAT WAS HAPPENING. THE ENGINE WAS REVVING UP AS I WAS APPLYING THE BRAKE, SO I APPLIED THE BRAKE HARDER AND THE ENGINE CONTINUED TO REV HIGHER UNTIL THE TRUCK LURCHED FORWARD. THIS CAUGHT ME BY SURPRISE AND MY FOOT CAME OFF THE BRAKE AND THE ENGINE REVVED DOWN. I REALIZED THAT MY FOOT HAD BEEN ON THE ACCELERATOR THE SAME TIME IT WAS ON THE BRAKE. SINCE THAT FIRST TIME, I KNOW THAT IF THE ENGINE STARTS REVVING WHILE I AM APPLYING THE BRAKE THAT I HAVE MY FOOT ON BOTH AND CAN ANGLE MY FOOT TO THE LEFT TO REMOVE IT FROM THE ACCELERATOR WHILE STILL KEEPING MY FOOT ON THE BRAKE. EVEN SO, ONE TIME I JUST MISSED HITTING THE CAR IN FRONT OF ME WHILE "STOPPING". THIS SEEMS TO ME TO BE A DANGEROUS DESIGN. WHEN THE ENGINE BEGINS REVVING FOR "NO APPARENT REASON" ONE TENDS TO PANIC AND STEPS HARDER ON THE BRAKE WHICH MAKES THE PROBLEM WORSE. I THINK THERE NEEDS TO BE A RECALL ON THIS PROBLEM. *TR

NHTSA ODI #10311152

28,000 miles · Dec 8, 2009
Power TrainCrashInjury

2008 FORD F-150 ACCELERATED ON ITS OWN AND CRASHED INTO A WALL. THE VEHICLE TRAVELED OVER 200 FEET AT FULL ACCELERATION AND SKID MARKS PROVE BRAKES WERE ENGAGED. ACCIDENT INJURED DRIVER AND EMPLOYEE OF THE BUSINESS IT CRASHED INTO. *TR

NHTSA ODI #10294888

5,000 miles · Jul 31, 2009
Power Train

2008 BRAND NEW F150 TRUCK - 5,000 MILES AND THE STARTER WOULDN'T ENGAGE THE FLYWHEEL.. STARTER GEAR SHAFT SHEARED COMPLETELY THROUGH. THE MECHANICS AT VISTA FORD/WOODLAND HILLS WERE BAFFLED BY THIS. THE STARTER GEAR SHAFT SHEARED COMPLETELY THROUGH AND THE ENGINE WAS NOT SEIZED SO THERE IS NO REASON FOR THAT TO HAPPEN. TH…

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2008 BRAND NEW F150 TRUCK - 5,000 MILES AND THE STARTER WOULDN'T ENGAGE THE FLYWHEEL.. STARTER GEAR SHAFT SHEARED COMPLETELY THROUGH. THE MECHANICS AT VISTA FORD/WOODLAND HILLS WERE BAFFLED BY THIS. THE STARTER GEAR SHAFT SHEARED COMPLETELY THROUGH AND THE ENGINE WAS NOT SEIZED SO THERE IS NO REASON FOR THAT TO HAPPEN. THIS WAS NOT THE CASE AS THE MECHANICS CHECKED THE TEETH IN THE FLYWHEEL AND TURNED IT BY HAND THEY WERE ABLE TO INSPECT THE FLYWHEEL AND FOUND EVERY TOOTH TO BE PERFECTLY IN TACT AND THE TEETH ON THE STARTER GEAR ITSELF WERE ALSO PERFECTLY IN TACT. THE ONLY DAMAGE WAS TO THE STARTING GEAR SHAFT BUT NOW I AM VERY CONCERNED FOR SAFETY AND WHAT CAUSED IT? *TR

NHTSA ODI #10278844

2,000 miles · Apr 3, 2009
Power TrainSteering

TL*THE CONTACT OWNS A 2008 FORD F-150. WHILE DRIVING BETWEEN 55-60 MPH ON NORMAL ROAD CONDITIONS, THE VEHICLE VIBRATED EXCESSIVELY. THE FAILURE OCCURRED WHENEVER THE VEHICLE WAS IN OPERATION AND WITHOUT WARNING. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER FOR INSPECTION, BUT THEY COULD NOT DUPLICATE THE FAILURE. HOWEVER, T…

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TL*THE CONTACT OWNS A 2008 FORD F-150. WHILE DRIVING BETWEEN 55-60 MPH ON NORMAL ROAD CONDITIONS, THE VEHICLE VIBRATED EXCESSIVELY. THE FAILURE OCCURRED WHENEVER THE VEHICLE WAS IN OPERATION AND WITHOUT WARNING. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER FOR INSPECTION, BUT THEY COULD NOT DUPLICATE THE FAILURE. HOWEVER, THE DEALER REPLACED THE DRIVESHAFT AND UNIVERSAL JOINTS. THE VEHICLE WAS TAKEN BACK TO THE DEALER ON TWO SEPARATE OCCASIONS FOR IDENTICAL FAILURES. IN ADDITION, THE TRANSMISSION WAS REPLACED AND FOUR NEW TIRES WERE MOUNTED ON THE VEHICLE. THE VEHICLE WAS AT THE DEALER FOR NINE WEEKS, BUT THE FAILURES PERSIST. THE CONTACT IS IN THE PROCESS OF TAKING THE VEHICLE TO AN INDEPENDENT MECHANIC FOR REPAIR. THE VIN WAS UNKNOWN. THE FAILURE MILEAGE WAS 2,000 AND CURRENT MILEAGE WAS 6,500.

NHTSA ODI #10264054

Mileage unknown · Feb 27, 2009
Power Train

MY VEHICLE IS A 2008 FORD F-150 SUPERCREW. THIS HAS AN AUTOMATIC TRANSMISSION. AFTER ABOUT 1000 MILES I NOTICED THAT THE ENGINE APPEARED TO STALL WHEN ACCELERATING UPHIILL (CHANGING GEARS) AND THAT THE RPM'S WOULD REV DURING CITY DRIVING. THE PROBLEM IS INTERMITTENT AND I HAD TO GO TO THE SERVICE DEPARTMENT SEVERAL TIMES TO ATTE…

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MY VEHICLE IS A 2008 FORD F-150 SUPERCREW. THIS HAS AN AUTOMATIC TRANSMISSION. AFTER ABOUT 1000 MILES I NOTICED THAT THE ENGINE APPEARED TO STALL WHEN ACCELERATING UPHIILL (CHANGING GEARS) AND THAT THE RPM'S WOULD REV DURING CITY DRIVING. THE PROBLEM IS INTERMITTENT AND I HAD TO GO TO THE SERVICE DEPARTMENT SEVERAL TIMES TO ATTEMPT TO PROVE THE ISSUE EXIST. AFTER IT WAS DISCOVERED THE SERVICE DEPARTMENT TORE DOWN THE TRANSMISSION AND REPLACED PARTS AND THIS DID NOT RESOLVE IT. A MONTH LATER FORD ACKNOWLEDGED THE ISSUE EXISTED AND AS DEALERS TO HOLD OFF ON REPAIR ATTEMPTS UNTIL ENGINEERING DID MRE RESEARCH. I HAVE A COPY OF THIS FROM THE OASIS ON MY VEHICLE. A MONTH LATER THE ATTEMPTED A DOWNLOAD OF INFORMATION TO UNIT. THIS IMPROVED THE PERFORMANCE OF THE VEHICLE. AFTER ABOUT 5 MONTHS THE ISSUES SLOWLY STARTED TO SHOW THEMSELVES AGAIN. I HAVE BEEN IN CONTACT WITH SEVERAL PEOPLE TO GET THIS RESOLVED. EACH TIME I HAVE GONE TO THE SERVICE DEPARTMENT THEY ARE LOOKING FOR CODES AND THE PROBLEM IS NOT PRODUCING ANY CODES. I AM ONCE AGAIN AT THIS TIME TAKING MY VEHICLE IN REPEATEDLY AND HOPING THAT ON THAT DAY SOMEONE WILL EXPERIENCE THE SAME THINGS WHICH I AM SPEAKING OF, JUST LIKE THEY DID IN THE BEGINNING OF THIS PROBLEM. *TR

NHTSA ODI #10260213

5,000 miles · Nov 7, 2008
Engine And Engine CoolingPower Train

FORD F-150 HAS ACCELERATED WITH FOOT ON BRAKE PEDAL 4 TIMES, TWICE WHILE IN REVERSE, TWICE WHEN STOPPING, ALWAYS AT LOW SPEED. IT WAS HARD TO STOP TRUCK, EVEN WITH FOOT FULL ON PEDAL. THE ENGINE WAS RACING WITH HIGH RPM'S. RESTARTING ENGINE RESOLVED ISSUE OR PUTTING IT IN NEUTRAL. THERE IS ALSO AN ISSUE WITH A/C VENTILATION. T…

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FORD F-150 HAS ACCELERATED WITH FOOT ON BRAKE PEDAL 4 TIMES, TWICE WHILE IN REVERSE, TWICE WHEN STOPPING, ALWAYS AT LOW SPEED. IT WAS HARD TO STOP TRUCK, EVEN WITH FOOT FULL ON PEDAL. THE ENGINE WAS RACING WITH HIGH RPM'S. RESTARTING ENGINE RESOLVED ISSUE OR PUTTING IT IN NEUTRAL. THERE IS ALSO AN ISSUE WITH A/C VENTILATION. TEMPERATURE VARIES FROM COOL TO HOT WHEN DIAL IS SET TO MOSTLY COOL AIR FLOW, REQUIRING CONSTANT ADJUSTING. TRUCK HAS BEEN TO DEALER 3 TIMES AND AM TOLD THEY CAN'T FIX IT UNLESS THEY EXPERIENCE IT THEMSELVES. *TR

NHTSA ODI #10247911

1,700 miles · Aug 26, 2008
Power Train

PURCHASED NEW FORD 150 SUPERCREW 4X4. ON 07/2008. AFTER ARRIVING AT STOP SIGN, STOPPED WHEN RESTARTED, THE ENGINE ACCELERATED BRAKES WOULD NOT STOP THE VEHICLE. HAD TO QUICKLY PUT TRANSMISSION INTO NEUTRAL TO AVOID HITTING OTHER VEHICLES. THIS RECURRED TWICE WHEN STOPPING AT STOP LIGHT AND STOP SIGN. *TR

NHTSA ODI #10239785

70 miles · Aug 8, 2008
Power Train

PURCHASED NEW FORD 150 SUPERCAB 2X4. ON 8/6/08. AUTOMATIC TRANSMISSION. DROVE ABOUT 60 MILES ON FREEWAY. AFTER ARRIVING AT DESTINATION, STOPPED AT STORE. WHEN RESTARTED, WHEN PREPARING TO ENTER ROAD, THE ENGINE ACCELERATED TO ABOUT 4,000 RPMS WHEN IT SHOULD HAVE BEEN AT IDLE. BRAKES WOULD NOT STOP THE VEHICLE. HAD TO QUIC…

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PURCHASED NEW FORD 150 SUPERCAB 2X4. ON 8/6/08. AUTOMATIC TRANSMISSION. DROVE ABOUT 60 MILES ON FREEWAY. AFTER ARRIVING AT DESTINATION, STOPPED AT STORE. WHEN RESTARTED, WHEN PREPARING TO ENTER ROAD, THE ENGINE ACCELERATED TO ABOUT 4,000 RPMS WHEN IT SHOULD HAVE BEEN AT IDLE. BRAKES WOULD NOT STOP THE VEHICLE. HAD TO QUICKLY PUT TRANSMISSION INTO NEUTRAL TO AVOID TRUCK MOVING INTO THE ROAD AND HITTING OTHER VEHICLES. THIS RECURRED 4 OR FIVE TIMES WHEN STOPPING AT STOP LIGHT, STOP SIGN AND STOPPING AT MOTEL. THE NEXT MORNING THIS RECURRED WHEN STOPPING AT MOTEL OFFICE. DID NOT REOCCUR. TOOK TRUCK INTO DEALER AND THEY ARE INSPECTING FOR PROBLEMS. *TR

NHTSA ODI #10237473

Mileage unknown · Apr 2, 2008
Power Train

I HAVE A 2008 FORD F-150 SUPERCREW WITH AN AUTOMATIC TRANSMISSION THAT I BOUGHT BRAND NEW AND IT HAS ABOUT 4,000 MILES ON IT NOW. THE TRANSMISSION DOES NOT SHIFT PROPERLY ALL THE TIME. ON ABOUT 12 TO 15 OCCASIONS THE TRANSMISSION HAS SHIFTED INTO NEUTRAL WHEN I AM TRAVELING BETWEEN 15 TO 30 MILES AN HOUR. THE TRANSMISSION SHI…

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I HAVE A 2008 FORD F-150 SUPERCREW WITH AN AUTOMATIC TRANSMISSION THAT I BOUGHT BRAND NEW AND IT HAS ABOUT 4,000 MILES ON IT NOW. THE TRANSMISSION DOES NOT SHIFT PROPERLY ALL THE TIME. ON ABOUT 12 TO 15 OCCASIONS THE TRANSMISSION HAS SHIFTED INTO NEUTRAL WHEN I AM TRAVELING BETWEEN 15 TO 30 MILES AN HOUR. THE TRANSMISSION SHIFTS INTO NEUTRAL WHEN I LET OFF THE GAS PEDAL AND I AM COASTING AROUND A CURVE, DOWN A HILL, OR AROUND AN ON OR OFF RAMP, WHILE COASTING AT A SPEED BETWEEN 15 TO 30 MILES PER HOUR. AFTER COASTING FOR A FEW SECONDS AND I ATTEMPT TO ACCELERATE IS WHEN I REALIZE THE TRUCK IS IN NEUTRAL BECAUSE THE RPMS GO UP AND THE TRUCK DOES NOT ACCELERATE. AFTER I LET OFF THE GAS PEDAL THE TRUCK WILL THEN SLAM INTO GEAR. I HAVE TAKEN MY FORD BACK TO THE DEALER TWO TIMES TO HAVE IT FIXED AND THEY SAY THEY CAN NOT FIX IT BECAUSE IT DOES NOT HAPPEN ALL THE TIME. THEY TOLD ME TO DRIVE IT UNTIL IT GETS WORSE AND THEN BRING IT BACK. I DID NOT REALIZE JUST HOW MUCH DANGER THEY WERE PUTTING ME IN UNTIL APRIL 1, 2008 BECAUSE THE TRUCK HAD NOT EVER SHIFTED INTO NEUTRAL WHILE I WAS COASTING AROUND AN OFF RAMP AND ATTEMPTING TO MERGE INTO TRAFFIC. ON APRIL 1ST I WAS TRAVELING AROUND AN OFF RAMP FROM A MAJOR HIGHWAY TO MERGE INTO TRAFFIC ON A MAJOR INTERSTATE AND WHEN I ATTEMPTED TO ACCELERATE AND MERGE INTO TRAFFIC AND TO MY SURPRISE THE TRUCK WAS IN NEUTRAL. A CAR ALMOST RAN INTO THE BACK OF MY TRUCK BEFORE MY TRUCK SLAMMED INTO GEAR AND I WAS ABLE TO ACCELERATE. I WAS ALMOST INVOLVED IN AN ACCIDENT BECAUSE THIS BRAND NEW TRUCK DOES NOT SHIFT PROPERLY AND FORD DOES NOT THINK IT IS IMPORTANT ENOUGH TO INVESTIGATE MORE AND TO FIX THE PROBLEM. I HAVE REPORTED IT TO FORD CUSTOMER RELATIONS CENTER AND THEY SAY THEY CAN NOT FIX IT UNTIL IT HAPPENS MORE FREQUENTLY AND THEN THEY CAN DUPLICATE THE OCCURRENCE. THE TRUCK IS UNSAFE TO DRIVE AND COULD CAUSE ME OR MY WIFE AND CHILDREN TO BE INVOLVED IN AN ACCIDENT. *TR

NHTSA ODI #10223206

Official recalls

1

08V523000 · Engine And Engine Cooling

Oct 8, 2008

ROUSH IS RECALLING 213 MY 2007-2008 FORD F-150 TRUCKS ALTERED TO OPERATE USING LIQUID PROPANE INJECTION. THE HYDRO-CARBON PAPER AFFIXED TO THE INSIDE OF THE AIRBOX LID WITH ADHESIVE MAY BECOME DISLODGED DURING OPERATION.

Consequence & remedy

Consequence: THIS FAILURE MAY RESULT IN A LOSS OF PERFORMANCE, ILLUMINATION OF THE MALFUNCTION INDICATOR LAMP (MIL) AND, IN EXTREME CASES, A STALLING OF THE VEHICLE DURING OPERATION WITHOUT NOTICE, WHICH COULD RESULT IN A CRASH.

Remedy: DEALERS WILL REPLACE THE AIRBOX LID WITH A NEW ONE THAT INCLUDES THE HYDRO-CARBON PAPER WHICH HAS BEEN AFFIXED USING AN ADHESIVE PROMOTER AND GREATER PRESSURE AS RECOMMENDED BY THE MANUFACTURER FREE OF CHARGE. THE RECALL BEGAN ON OCTOBER 21, 2008. OWNERS MAY CONTACT ROUSH AT 1-866-307-6788.

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

1

PE08060 · 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