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2008 Mercury Grand Marquis

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2008 Mercury Grand Marquis do not stand out strongly from the model-year median of 78.

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How this year compares

Owner complaints by model year

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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

66 reports with mileage · 12 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.

  • Steering. Review the 21 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Vehicle Speed Control. Review the 15 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Electrical System. Review the 9 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

11 crash reports1 fire reports7 injury reports

Steering complaints

21 reports
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44,725 miles · Aug 25, 2015
Steering

AFTER EXPERIENCING A STRANGE SIREN-LIKE SOUND INTERMITTENTLY FOR A FEW DAYS, ESPECIALLY WHEN MAKING A TURN, I NOTICED ON SUNDAY THAT THIS NOISE WAS BECOMING LOUDER AND MORE FREQUENT. AFTER DRIVING ONLY ABOUT TWO MILES I REALIZED THAT SOMETHING FELT ODD IN THE STEERING, SO I IMMEDIATELY RETURNED HOME. ON MONDAY AUGUST 24, 2015 I …

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AFTER EXPERIENCING A STRANGE SIREN-LIKE SOUND INTERMITTENTLY FOR A FEW DAYS, ESPECIALLY WHEN MAKING A TURN, I NOTICED ON SUNDAY THAT THIS NOISE WAS BECOMING LOUDER AND MORE FREQUENT. AFTER DRIVING ONLY ABOUT TWO MILES I REALIZED THAT SOMETHING FELT ODD IN THE STEERING, SO I IMMEDIATELY RETURNED HOME. ON MONDAY AUGUST 24, 2015 I TOOK THE CAR TO MY MECHANIC FOR DIAGNOSIS AND WAS TOLD THAT THE RACK AND PINION NEEDED TO BE REPLACED; SINCE THIS WAS A POTENTIALLY VERY DANGEROUS PROBLEM I AGREED TO HAVE THE WORK DONE IMMEDIATELY WHICH ENTAILED LEAVING IT OVERNIGHT FOR COMPLETION. LATER IN THE EVENING I HAD A NAGGING FEELING THAT I HAD HEARD ABOUT A SIMILAR ISSUE, SO I CHECKED MY CAR RECORDS AND CONFIRMED THAT I HAD TAKEN MY CAR TO MY CLOSEST MERCURY DEALER IN RESPONSE TO A RECALL #13S08 FROM FORD MOTOR CORP. ON NOV. 13, 2013; THE GARAGE "INSPECTED THE STEERING SHAFT" AND DECLARED "NO REPAIRS NEEDED AT THIS TIME". I WAS TOLD, HOWEVER, THAT I WOULD BE ASKED TO RETURN IN A FEW MONTHS WHEN THEY HAD SUFFICIENT PARTS TO ADDRESS THE RECALL FULLY.IN MARCH 2014 FORD NOTIFIED ME TO AGAIN CONTACT THE DEALER IN REGARD TO SAFETY RECALL 13S08/NHTSA RECALL13V385. THE DEALERSHIP DID THE RECALL REPAIR ON APRIL 22, 2014 WHICH INVOLVED "REPLACING THE LOWER INTERMEDIATE STEERING SHAFT". UPON INVESTIGATION I LEARNED THAT THIS IS CERTAINLY IN THE AREA OF MY NOW FAILED RACK AND PINION ASSEMBLY. WHAT MAKES THIS FRIGHTENING TO ME IS THAT THE REPAIR WAS DONE AT A MILEAGE OF 39923 AND THE PART FAILED AT A MILEAGE OF 44,725. WHEN I CALLED FORD THIS MORNING TO ASK ABOUT ANY HELP THEY MIGHT GIVE ME WITH THIS OR WHETHER OR NOT THIS HAD BEEN A PROBLEM TO OTHER DRIVERS I WAS POLITELY TOLD THAT A RECALL REPAIR IS A ONE TIME FIX. SINCE THE FAILED PART OCCURRED ONLY 4800 MILES AFTER THE REPAIR, I THINK THAT PERHAPS THE "FIX" WAS NOT ENOUGH; THIS SEEMS UNFAIR, ESPECIALLY IF IT EFFECTS MANY DRIVERS. HELP?

NHTSA ODI #10759319

66,000 miles · May 12, 2015
SteeringStructure

TL* THE CONTACT OWNS A 2008 MERCURY GRAND MARQUIS. WHILE DRIVING APPROXIMATELY 35 MPH, THE STEERING WHEEL SEIZED. THE VEHICLE WAS TAKEN TO THE DEALER WHO DIAGNOSED THAT THE UPPER INTERMEDIATE STEERING SHAFT FAILED. THE VEHICLE WAS REPAIRED. IN ADDITION, THE MECHANIC DISCOVERED THAT THE SUBFRAME WAS RUSTED AND CORRODED. THE VEHIC…

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TL* THE CONTACT OWNS A 2008 MERCURY GRAND MARQUIS. WHILE DRIVING APPROXIMATELY 35 MPH, THE STEERING WHEEL SEIZED. THE VEHICLE WAS TAKEN TO THE DEALER WHO DIAGNOSED THAT THE UPPER INTERMEDIATE STEERING SHAFT FAILED. THE VEHICLE WAS REPAIRED. IN ADDITION, THE MECHANIC DISCOVERED THAT THE SUBFRAME WAS RUSTED AND CORRODED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 66,000.

NHTSA ODI #10716006

Mileage unknown · Mar 11, 2015
Steering

TL* THE CONTACT OWNS A 2008 MERCURY GRAND MARQUIS. THE CONTACT RECEIVED A RECALL NOTICE FOR NHTSA CAMPAIGN NUMBER: 13V385000 (STEERING); HOWEVER, THE PARTS WERE NOT AVAILABLE. THE CONTACT TOOK THE VEHICLE TO THE DEALER TWICE AND WAS INFORMED THAT THE VEHICLE COULD NOT BE REPAIRED BECAUSE THE MANUFACTURER HAD NOT MADE THE PARTS A…

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TL* THE CONTACT OWNS A 2008 MERCURY GRAND MARQUIS. THE CONTACT RECEIVED A RECALL NOTICE FOR NHTSA CAMPAIGN NUMBER: 13V385000 (STEERING); HOWEVER, THE PARTS WERE NOT AVAILABLE. THE CONTACT TOOK THE VEHICLE TO THE DEALER TWICE AND WAS INFORMED THAT THE VEHICLE COULD NOT BE REPAIRED BECAUSE THE MANUFACTURER HAD NOT MADE THE PARTS AVAILABLE. THE MANUFACTURER WAS AWARE OF THE ISSUE. THE CONTACT HAD NOT EXPERIENCED A FAILURE.

NHTSA ODI #10693654

62,008 miles · Feb 24, 2015
Steering

I HAVE HAD TROUBLE WITH MY POWER STEERING ON MY 2008 MERCURY GRAND MARQUIS. WHEN ITS COLD OUTSIDE OR WHEN I NEED TO MAKE A REALLY QUICK TURN OF THE WHEEL IT TURNS VERY HARD AND HAS CAUSED ME TO ALMOST HAVE AND ACCIDENT. THE CAR HAS SPEED SENSITIVE POWER STEERING ON IT . I HAVE OWNED SEVERAL FORD CARS AND TRUCKS BUT THIS IS THE F…

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I HAVE HAD TROUBLE WITH MY POWER STEERING ON MY 2008 MERCURY GRAND MARQUIS. WHEN ITS COLD OUTSIDE OR WHEN I NEED TO MAKE A REALLY QUICK TURN OF THE WHEEL IT TURNS VERY HARD AND HAS CAUSED ME TO ALMOST HAVE AND ACCIDENT. THE CAR HAS SPEED SENSITIVE POWER STEERING ON IT . I HAVE OWNED SEVERAL FORD CARS AND TRUCKS BUT THIS IS THE FIRST STEERING PROBLEM I HAVE HAD. I REALLY WISH I HAD NEVER BOUGHT A CAR WITH THIS TYPE OF POWER STEERING SYSTEM ON IT. I THINK THAT THIS A PROBLEM ON FORD CARS WITH THIS TYPE OF STEERING SYSTEM ON THEM I HAVE TALKED WITH SEVERAL OTHER FORD CAR OWNERS WITH THE SAME PROBLEM AND NONE OF THEM HAVE BEEN GIVEN A REAL ANSWER AS TO WHAT CAN BE DONE. *JS

NHTSA ODI #10690296

50,000 miles · Oct 7, 2014
Steering

TL* THE CONTACT OWNS A 2008 MERCURY GRAND MARQUIS. THE CONTACT STATED WHILE DRIVING VARIOUS SPEEDS, THERE WAS A COMPLETE LOSS OF POWER STEERING WITHOUT WARNING. THE CONTACT CONTINUED DRIVING EVEN THOUGH THE STEERING WHEEL WAS VERY DIFFICULT TO MANEUVER. THE FAILURE RECURRED INTERMITTENTLY. THE VEHICLE WAS TAKEN TO AN AUTHORIZED…

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TL* THE CONTACT OWNS A 2008 MERCURY GRAND MARQUIS. THE CONTACT STATED WHILE DRIVING VARIOUS SPEEDS, THERE WAS A COMPLETE LOSS OF POWER STEERING WITHOUT WARNING. THE CONTACT CONTINUED DRIVING EVEN THOUGH THE STEERING WHEEL WAS VERY DIFFICULT TO MANEUVER. THE FAILURE RECURRED INTERMITTENTLY. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER TWO TIMES AND THEY WERE UNABLE TO DUPLICATE A PROBLEM. THE FAILURE BECAME PROGRESSIVELY WORSE. THE MANUFACTURER WAS NOTIFIED OF THE ISSUE. THE APPROXIMATE FAILURE MILEAGE WAS 50,000.

NHTSA ODI #10643094

Mileage unknown · Oct 1, 2014
Electrical SystemPower TrainSteeringCrash

2008 MERCURY GRAND MARQUIS. CONSUMER STATES VEHICLE WAS RECALLED FOR POOR STEERING. THE CONSUMER WAS IN AN ACCIDENT WHEREBY HE WAS UNABLE TO TURN THE IGNITION KEY OFF AND SHIFT THE GEAR . *TGW

NHTSA ODI #10638927

100,000 miles · Mar 7, 2014
Steering

NHTSA RECALL 13V385 STEERING DEALERSHIP HAS INDICATED THAT REPAIR PARTS ARE NOT AVAILABLE. INITIAL NOTICE 10/2013 SAFETY RECALL NOTICE 13S08. *TR

NHTSA ODI #10567841

300 miles · Mar 6, 2014
Steering

TL* THE CONTACT OWNS A 2008 MERCURY GRAND MARQUIS. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN ID NUMBER: 13V385000 (STEERING) AND STATED THAT THE PARTS WERE NOT AVAILABLE. THE DEALER ADVISED THAT PART WAS NOT AVAILABLE TO COMPLETE THE REQUIRED REPAIRS. THE MANUFACTURER WAS CONTACTED AND PROVIDED AN UNREASONABLE DATE F…

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TL* THE CONTACT OWNS A 2008 MERCURY GRAND MARQUIS. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN ID NUMBER: 13V385000 (STEERING) AND STATED THAT THE PARTS WERE NOT AVAILABLE. THE DEALER ADVISED THAT PART WAS NOT AVAILABLE TO COMPLETE THE REQUIRED REPAIRS. THE MANUFACTURER WAS CONTACTED AND PROVIDED AN UNREASONABLE DATE FOR WHEN THE VEHICLE WOULD RECEIVE THE RECALL SERVICE. THE CONTACT HAD NOT EXPERIENCED A FAILURE. *TR

NHTSA ODI #10567568

47,000 miles · Nov 15, 2013
SteeringCrashInjury

TL* THE CONTACT OWNS A 2008 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 5 MPH AND ATTEMPTING A LEFT TURN, A LOUD ABNORMAL NOISE WAS HEARD FROM THE VEHICLE AS THE POWER STEERING ASSIST FAILED. THE CONTACT LOST STEERING CONTROL OF THE VEHICLE AND CRASHED INTO A DITCH, CAUSING THE AIR BAGS TO DEPLOY. …

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TL* THE CONTACT OWNS A 2008 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 5 MPH AND ATTEMPTING A LEFT TURN, A LOUD ABNORMAL NOISE WAS HEARD FROM THE VEHICLE AS THE POWER STEERING ASSIST FAILED. THE CONTACT LOST STEERING CONTROL OF THE VEHICLE AND CRASHED INTO A DITCH, CAUSING THE AIR BAGS TO DEPLOY. THE CONTACT SUSTAINED INJURIES TO THE LEFT HIP AND RIGHT LEG. A POLICE REPORT WAS FILED OF THE INCIDENT. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC, WHO DIAGNOSED THAT THE VEHICLE WAS DESTROYED AND COULD NOT BE REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 47,000.

NHTSA ODI #10552433

45,659 miles · May 17, 2013
Steering

VEHICLE WAS COMING OFF OF A HIGHWAY EXIT RAMP DOING AROUND 40-45 MPH AND IN THE MIDDLE OF THIS TURN THE DRIVER LOST HIS CONTROL OF HIS STEERING CAUSING THE VEHICLE TO VEER INTO ONCOMING TRAFFIC ALMOST CAUSING A HEAD ON COLLISION. UPON INSPECTION OF VEHICLE FOUND THAT A STERRING COLUMN SHAFT WICH IS ONLY HELD IN PLACE BY A PLAST…

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VEHICLE WAS COMING OFF OF A HIGHWAY EXIT RAMP DOING AROUND 40-45 MPH AND IN THE MIDDLE OF THIS TURN THE DRIVER LOST HIS CONTROL OF HIS STEERING CAUSING THE VEHICLE TO VEER INTO ONCOMING TRAFFIC ALMOST CAUSING A HEAD ON COLLISION. UPON INSPECTION OF VEHICLE FOUND THAT A STERRING COLUMN SHAFT WICH IS ONLY HELD IN PLACE BY A PLASTIC RETAINER AND CONSIST OF 4 CLIPS, 2 OF THE CLIPS WERE BROKEN CAUSING THE COLUMN SHAFT TO SLIDE APART AND HAVE LOSS OF STEERING. SO FAR THE ONLY FIX FROM FORD IS TO SELL YOU A NEW STERRING COLUMN 7W1Z-3C529-A THIS PART IS DESIGNED THE SAME WAY AS THE OLD PART WAS. THIS ISSUE COULD CAUSE A FATAL ACCIDENT, I AM A MECHANIC WITH A GOVERMENT AGENCY WITH MANY OF THESE VEHICLES IN OUR FLEET. I URGE YOU TO PLEASE LOOK INTO THIS ISSUE AND ASK FOR A RECALL WITH THESE VEHICLES BEFORE A LIFE IS LOST! *TR

NHTSA ODI #10512484

Official recalls

3

14V704000 · Steering:rack And Pinion:pinion Shaft

Nov 5, 2014

Ford Motor Company (Ford) is recalling certain model year 2005-2011 Ford Crown Victoria, 2005-2011 Mercury Grand Marquis vehicles manufactured March 23, 2004, to August 30, 2011, and 2005-2011 Lincoln Town Car vehicles manufactured March 8, 2004, to August 30, 2011, and on which the upper intermediate shaft was serviced during the course of safety recall 13V-385. The prior repairs may not have been correctly performed.

Consequence & remedy

Consequence: Improper servicing of the upper intermediate shaft could cause the shaft to separate, which can then result in a loss of steering control, and increasing the risk of a crash.

Remedy: Ford will notify the owners of vehicles whose repair records reflect that the upper intermediate steering shaft was repaired during the course of the prior recall 13V-385. Dealers will inspect and replace the upper immediate shaft if necessary free of charge. The recall began November 17, 2014. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 14S25.

13V385000 · Steering

Aug 29, 2013

Ford is recalling certain model year 2005-2011 Ford Crown Victoria (including Crown Victoria Police Interceptors), Mercury Grand Marquis, and Lincoln Town Car vehicles. The affected vehicles are currently registered or were originally sold in Connecticut, Delaware, the District of Columbia, Illinois, Indiana, Iowa, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, Virginia, West Virginia, and Wisconsin. Severe corrosion can seize the lower intermediate shaft which may cause the upper intermediate shaft to collapse and the steering column lower bearing to separate.

Consequence & remedy

Consequence: If the lower bearing separates, the vehicle may experience a loss of steering, increasing the risk of a crash.

Remedy: Ford will notify owners and dealers will replace the lower intermediate shaft, free of charge. The upper intermediate shaft and steering column lower bearing will be inspected to identify any damage that may have occurred as a result of lower intermediate shaft corrosion, and repaired or replaced as necessary. If the steering column lower bearing has separated, a retainer clip will be installed. The recall began on October 23, 2013. Owners may contact Ford at 1-866-436-7332. Ford's recall number is 13S08.

07V270000 · Suspension:front:hub

Jun 26, 2007

ON CERTAIN PASSENGER VEHICLES, A FRONT WHEEL BEARING AND HUB ASSEMBLY MAY FRACTURE DUE TO IMPROPER HEAT TREATMENT.

Consequence & remedy

Consequence: IF A HUB FRACTURES, IT MAY POTENTIALLY DETACH FROM THE WHEEL KNUCKLE, RESULTING IN THE WHEEL BEING RETAINED ONLY BY THE BRAKE CALIPER ASSEMBLY. AS A RESULT, THE WHEEL MAY SEPARATE FROM THE VEHICLE POTENTIALLY RESULTING IN A CRASH.

Remedy: DEALERS WILL INSPECT BOTH FRONT WHEEL BEARING AND HUB ASSEMBLIES AND REPLACE THEM FREE OF CHARGE. THE RECALL BEGAN ON JUNE 22, 2007. OWNERS MAY CONTACT FORD AT 1-800-392-3673.

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