Owners have filed 202 complaints
about the 1999 Mercury Grand Marquis with NHTSA between 1998 and 2023.
The largest single group is the engine & cooling.
Across this model's run it ranks 14 of 19 worst.
The letter says how bad. This says what kind — whether this year drew
an unusual number of complaints, unusually dangerous
ones, or failures that arrived unusually early.
The dashed ring is 50 — the national norm. Further out is worse.
Complaint volume — 46
Against the median year of the Mercury Grand Marquis. 50 means typical for this
model; 100 means roughly double.
Severity — 89
17.3% of these complaints
involved a crash, fire, injury or death, against a national rate of
9.7%.
Early failure — 5
3% of failures with a mileage on record happened under
36,000 miles, against a national rate of
29%.
How 1999 compares with every other Mercury Grand Marquis
NHTSA files every complaint against a named sub-assembly, not just a
system. This is the difference between knowing it was "the engine" and
knowing which part of it — the list to hand a mechanic.
Manifold/Header/Muffler/Tail Pipe
715.9%
Headlights
715.9%
TIE ROD Assembly
511.4%
Engine
511.4%
Steering Wheel/Handle BAR
511.4%
Front
511.4%
Frontal
511.4%
Automatic Transmission
511.4%
When it fails
Odometer readings owners gave when they filed. About half of all
complaints include one.
1,000 – 9,999 miles
11.4%
10,000 – 24,999 miles
11.4%
25,000 – 49,999 miles
45.5%
50,000 – 74,999 miles
1013.7%
75,000 – 99,999 miles
1520.5%
100,000 – 149,999 miles
2737.0%
150,000+ miles
1520.5%
When owners complained
A spike years after the car went on sale usually means a part wearing
out on schedule across the whole fleet — the kind of pattern no single
owner can see from inside their own car.
Nov 1998peak 14Jul 2023
NHTSA investigations into the 1999 Mercury Grand Marquis
An investigation is the step before a recall: the agency has seen enough
complaints to look into a pattern itself. An open one means it thinks
something may be wrong and nothing has been fixed yet.
DP05005Opened 22 Sep 2005Closed 4 Jan 2006ENGINE AND ENGINE COOLING:ENGINE
SPARK PLUG EJECTION FROM CYLINDER HEAD
ON SEPTEMBER 6, 2005, ODI RECEIVED A PETITION REQUESTING THAT THE AGENCY INVESTIGATE ALLEGATIONS OF ENGINE SPARK PLUG EJECTION IN CERTAIN MODEL YEAR 1997 THROUGH 2004 FORD VEHICLES WITH TRITON V-8 AND V-10 ENGINES.ODI RECEIVED A TOTAL OF 474 NON-DUPLICATIVE COMPLAINTS ON THE SUBJECT VEHICLES WHERE THE COMPLAINANT, OR THE DEALER REPAIRING THE VEHICLE, REPORTED THAT A SPARK PLUG DETACHED FROM THE CYLINDER AND/OR EJECTED FROM THE ENGINE.AS OF DECEMBER 8, 2005, ODI IS NOT AWARE OF ANY ALLEGATIONS WHERE THE ALLEGED DEFECT RESULTED IN A LOSS OF VEHICLE CONTROL, A CRASH, AN INJURY, OR A FATALITY IN A...
DP02007Opened 22 Aug 2002Closed 4 Dec 2002VEHICLE SPEED CONTROL:LINKAGES
FUEL-FED FIRES
THE FARS DATA SHOWS THAT THE RISK OF FIRE FROM IMPACT IN ALL DIRECTIONS IN THE SUBJECT VEHICLES IS THE SAME AS ALL OTHER SEDANS.THE SUBJECT VEHICLES ARE NOT OVER REPRESENTED WITH RESPECT TO THE RISK OF FIRE IN REAL-WORLD HIGH-ENERGY CRASHES.A FURTHER DISCUSSION OF ISSUES RELATED TO POST CRASH FIRES IN THE SUBJECT VEHICLES IS SET OUT IN THE CLOSING REPORT FOR SQ 01-014 AND THAT REPORT IS IN THE DOCKET FOR THIS PETITION.AFTER REVIEWING THE PETITION AND ITS SUPPORTING MATERIALS, AS WELL AS INFORMATION FURNISHED BY FORD AND GM, AND INFORMATION WITHIN THE AGENCY'S POSSESSION FROM PREVIOUS INVESTIGA...
SQ01014Opened 27 Nov 2001Closed 3 Oct 2002FUEL SYSTEM, GASOLINE:STORAGE
POST REAR END COLLISION FIRES
Recalls on the 1999 Mercury Grand Marquis
A complaint is one owner's allegation. A recall is the point at which
the manufacturer or a regulator agreed the defect is real and dangerous
enough to fix for free — however old the car is.
Canada — Transport Canada
Canada runs its own recall programme, and its campaigns do not
always mirror the American ones.
Recall 200015825,115 units in Canada
Other
Certain vehicle have jacking instructions which, if followed, may cause the operator to place the jack on a frame weld when attempting to raise a rear wheel. If the vehicle is jacked up with the jack placed on the frame weld and if the wheels are not blocked or chocked, then the jack may yield and the vehicle may drop suddenly with the potential for injury to the operator. Correction: Owners will be provided with a revised Jack Instruction and Stowage Card and Jack Warning Label and a supplement to the owner guide. This information moves the jacking location several inches forward of the frame weld and clearly recommends that the diagonally opposite wheel be blocked.
Reports where the owner recorded a crash, a fire, an injury or a death.
Gulfport, MSCrash
SEAT BELTS
My significant other and I were in an accident on the interstate. The airbags deployed and the seat belts failed to lock in place.
NHTSA complaint #11532067 — an unverified report by a vehicle owner.
at 140,000 milesSalt Lake City, UTCrash2 injured
STEERING
WHILE DRIVING ON THE EXPRESSWAY, THE VEHICLE SUDDENLY CHANGED LANES AND THE STEERING BECAME ERRATIC. UPON EXAMINATION, THE IDLER ARM HAD SEPARATED FROM THE STEERING LINK ARM. THERE WAS NO WARNING AND THE VEHICLE HAD RECENTLY PASSED A SAFETY INSPECTION.
NHTSA complaint #10786786 — an unverified report by a vehicle owner.
Wallingford, CTCrash
SERVICE BRAKES, HYDRAULIC
I WAS COMING TO A STOP WHEN THE BRAKE PEDAL STARTED VIBRATING AND GOING LOWER AND LOWER TO THE FLOOR AND THE CAR DID NOT STOP RESULTING IN AN ACCIDENT. I WAS TOLD BY THE FORD MECHANIC THAT THE COMPUTER TESTS DID NOT SHOW ANY PROBLEM WITH THE ANTILOCK SYSTEM BUT I THINK THERE IS A PROBLEM WHEN YOU APPLY YOUR BRAKES AND THE CAR DOES NOT STOP. I HAVE ALSO TALKED TO A NUMBER OF PEOPLE SOME OF THEM WHO WORK ON CARS ETC..AND FOUND OUT THAT THIS IS NOT AN UNCOMMON PROBLEM. FURTHERMORE, IT HAPPENS A LOT AND ON ALL TYPES OF VEHICLES WITH ANTILOCK SYSTEMS. I WAS TOLD THAT THIS CAN HAPPEN ON AND OFF WHICH IS WHY IT IS HARD TO DETECT. I WAS LUCKY IN THE FACT THAT I WAS GOING SLOW AND NOBODY WAS HURT, BUT WHAT IF THAT HAD BEEN A DIFFERENT ENDING AND IT HAD BEEN A SERIOUS ACCIDENT? I HAVE NEVER BEEN IN AN ACCIDENT BEFORE AND I RESENT THE FACT THAT I WAS NOT AT FAULT FOR THIS ONE, THE BRAKES DID NOT WORK!!!!!
NHTSA complaint #10457575 — an unverified report by a vehicle owner.
at 116,000 milesJefferson, OH1 injured
STRUCTURE:BODY:HOOD:HINGE AND ATTACHMENTS
ON JAN. 25, 2006 I STOPPED AT A REST AREA TO PUT WINDSHIELD WASHER FLUID IN MY CAR. THE HYDRAULICS ON THE HOOD FAILED, CAUSING THE HOOD TO SLAM SHUT ON MY ARM. THE HOOD LATCHED AND THE LATCH WAS JAMMED DUE TO MY ARM BEING CAUGHT UNDER THE HOOD. TWO ODOT WORKERS FINALLY CAME TO HELP ME. THEY COULD NOT OPEN THE HOOD BY USING THE HOOD RELEASE IN THE CAR, NOR BY USING THE RELEASE UNDER THE HOOD. THEY HAD TO PRY OPEN THE HOOD, FOR ME TO PULL MY ARM OUT. MY ARM WAS PINNED FOR 20 MINUTES. I HAVE BEEN LEFT WITH A PERMANENT DISABILITY IN MY RIGHT ARM AND HAND. I AM IN CONSTANT EXCRUTIATING PAIN WHICH I WILL HAVE TO LIVE WITH FOR THE REST OF MY LIFE.
NHTSA complaint #10169750 — an unverified report by a vehicle owner.
at 86,000 milesWalton, NYCrash2 injured
SEAT BELTS:FRONT:RETRACTOR
DT*: THE CONTACT STATED, AS THE BREAK PEDAL WAS RELEASED TO BEGIN A LEFT TURN, THE VEHICLE WAS REAR ENDED BY ANOTHER VEHICLE. THE DRIVER SIDE SEATBELT RETRACTOR FAILED TO LOCK, CAUSING THE CONTACT'S HEAD TO HIT THE STEERING WHEEL, WHICH RESULTED IN AN INJURY. A POLICE REPORT WAS FILED AND A COMPLAINT WAS FILED WITH THE MANUFACTURER.
NHTSA complaint #10163032 — an unverified report by a vehicle owner.
at 94,000 milesPhoenix, AZ1 injured
ENGINE AND ENGINE COOLING
COMPLETE CRACKING OF PLASTIC INTAKE MANIFOLD CAUSING COMPLETER LOSS OF COOLANT AND $1400 REPAIR WITH THE NEW REPLACEMENT METAL MANIFOLD.
NHTSA complaint #10121090 — an unverified report by a vehicle owner.
The most recent complaints
In the owners' own words, exactly as filed with NHTSA.
Gulfport, MSCrash
SEAT BELTS
My significant other and I were in an accident on the interstate. The airbags deployed and the seat belts failed to lock in place.
NHTSA complaint #11532067 — an unverified report by a vehicle owner.
at 120,000 milesKissimmee, FL
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
The contact owns a 1999 Mercury Grand Marquis. The contact stated that the vehicle had a leaking intake manifold. The vehicle was taken to an independent mechanic and diagnosed that the intake manifold needed to be replaced. The vehicle was not repaired. The dealer and manufacturer were made aware of the failure but informed the contact that there was no recall associated with the VIN. The failure mileage was approximately 120,000.
NHTSA complaint #11448881 — an unverified report by a vehicle owner.
at 160,000 milesAbbeville, SC
EXTERIOR LIGHTING
MY HEADLIGHTS, HAZARDS, AND TURN SIGNALS ALL JUST RANDOMLY WENT OUT WHILE DRIVING. THEY HAVE NOT COME BACK ON SINCE. AFTER READING FORUMS I BELIEVE IT TO BE THE LCM BUT MY YEAR MODEL IS NOT INCLUDED IN THE RECALL. I BELIEVE THIS ISSUE DATES BACK FARTHER THAN 2000 AND FORD SHOULD STEP UP AND RECALL MORE OF THESE LCM COMPONENTS.
NHTSA complaint #11340109 — an unverified report by a vehicle owner.
at 154,850 milesOshkosh, WI
STEERING
WHILE DRIVING PINS IN STEERING COULM BECAME LOSSE AND CAUSED CAR TO SHUT OFF WHILE AT STOP LIGHT HAD TO TOW TO SERVICE SHOP; HAD FOUND COMMON FORD ISSUE WITH LOOSE STEERING PINS IN 1999 MERCURY GRAND MARQUIS SHOULD BE RECALL VERY DANGEROUS TO HAPPEN TO SOME CAST IS $300 PLUS TAX AND TOW I FEEL FORD OUWES ME TO THIS THAT BUILT THIS CAR NOT ME ITS COST AS MUCH AS A DECENT USED CAR TO DAY I WOULD LIKE FORD TO OFFFER ME HELP; WITH THERE PAST ISSUES WITH CARS
NHTSA complaint #11278876 — an unverified report by a vehicle owner.
at 112,004 milesNEW Paris, OH
ENGINE
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
NHTSA complaint #11195369 — an unverified report by a vehicle owner.
at 160,000 milesOrangevale, CA
EXTERIOR LIGHTING
TL* THE CONTACT OWNS A 1999 MERCURY GRAND MARQUIS. WHILE DRIVING 65 MPH, THE HEADLIGHTS FAILED TO OPERATE INTERMITTENTLY. THE CONTACT STATED THAT THE VEHICLE EXHIBITED THE SAME SYMPTOMS AS LISTED IN NHTSA CAMPAIGN NUMBER: 15V861000 (EXTERIOR LIGHTING). THE VEHICLE WAS NOT TAKEN TO A DEALER TO BE DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED AND DID NOT ASSIST. THE FAILURE MILEAGE WAS APPROXIMATELY 160,000.
NHTSA complaint #11123542 — an unverified report by a vehicle owner.
at 155,000 milesBethel, OH
EXTERIOR LIGHTING
VEHICLE WAS PARKED. I WENT TO TURN MY HEADLIGHTS ON. NO HEADLIGHTS, TURN SIGNALS, DASH LIGHTS, HAZARD FLASHERS OR DOME LIGHT. THE 2003-2005 MODELS WERE RECALLED FOR THIS SAME THING WITH THE LCM FAILING. PLEASE LOOK INTO THIS AS THIS IS A SERIOUS SAFETY ISSUE.
NHTSA complaint #11102426 — an unverified report by a vehicle owner.
at 155,000 milesBethel, OH
ELECTRICAL SYSTEM
VEHICLE WAS PARKED. I WENT TO TURN MY HEADLIGHTS ON. NO HEADLIGHTS, TURN SIGNALS, DASH LIGHTS, HAZARD FLASHERS OR DOME LIGHT. THE 2003-2005 MODELS WERE RECALLED FOR THIS SAME THING WITH THE LCM FAILING. PLEASE LOOK INTO THIS AS THIS IS A SERIOUS SAFETY ISSUE.
NHTSA complaint #11102426 — an unverified report by a vehicle owner.
at 135,000 milesSt.clair, MI
ENGINE
TL* THE CONTACT OWNS A 1999 MERCURY GRAND MARQUIS. WHILE THE VEHICLE WAS PARKED WITH THE ENGINE RUNNING, THE CONTACT SHIFTED INTO REVERSE AND NOTICED STEAM COMING FROM THE HOOD. THE VEHICLE WAS THEN SHIFTED BACK INTO PARK AND TURNED OFF THE ENGINE. UPON OPENING THE HOOD, THE CONTACT NOTICED THAT A PART OF THE MANIFOLD WAS MISSING THE THERMOSTAT. THE CONTACT WAS UNSURE OF ANY WARNING INDICATORS ILLUMINATING. THE CONTACT WENT TO BILL MACDONALD FORD (1200 S CARNEY DR, ST CLAIR, MI 48079, (810) 329-6601) AND WAS INFORMED THERE WERE NO RECALLS. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE ISSUE. THE FAILURE MILEAGE WAS APPROXIMATELY 135,000.
NHTSA complaint #11060700 — an unverified report by a vehicle owner.
at 160,000 milesCurran, MI
EXTERIOR LIGHTING
WE OWN THREE MERCURY GRAND MARQUIS, LOVE THE CARS HOWEVER ALL THREE( 2000, 1999 AND SECOND 1999 ALL INTEMITANTLY LOOSE HEADLIGHTS WHEN HIGH BEAMS ARE ON. IF I QUICKLY GO TO LOW BEAMS I CAN SEE AGAIN...ITS LIKE THEY ARE OVERHEATING WITH THE AMP DRAW OF HIGH BEAMS AND CIRCUIT BREAKS. THIS IS WAY TOO COMMON TO BE OK. IT DANGEROUS ESPECIALLY IF ONE GETS RATTLED WITH COMPLETE DARKNESS AT NIGHT AND HIGH SPEED. BUMPS ALSO SEAM TO SLIGHTLY AFFECT IT SOMETIMES. THIS HAPPENS ANY TIME THE GRAY 99 HAS HIGH BEAMS ON FOR ABOUT 45MINS. ONLY 10-15MINS ON BLUE 1999 AND 2000 NOT AS FREQUENT YET BUT ONLY HAS ABOUT 75K MILES, WHERE AS THE 1999 ARE 150-210 RESPECTIVELY. STARTED 5 YEARS AGO ON MY FIRST AND I JUST DID NOT USE HIGH BEAM SINCE I PURCHASE SECOND 1999 TO REPLACE FIRST AND HAD TITLE ISSUES SO BOUGHT THE 3RD 2000 AND FOUND THEY ALL HAVE THE SAME FLAW!! MY CELL [XXX]. INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).
NHTSA complaint #11030761 — an unverified report by a vehicle owner.
at 134,000 milesNEW Straitsville, OH
EXTERIOR LIGHTING
TL* THE CONTACT OWNS A 1999 MERCURY GRAND MARQUIS. WHILE DRIVING APPROXIMATELY 45 MPH, THE HEADLIGHTS SUDDENLY BEGAN TO FLICKER OFF AND ON. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO DIAGNOSED THAT THE LIGHT CONTROL MODULE WAS FAULTY AND NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE, BUT NO ASSISTANCE WAS OFFERED. THE LOCAL DEALER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS 134,000.
NHTSA complaint #11019275 — an unverified report by a vehicle owner.
at 185,000 milesThree Rivers, MI
ENGINE
PLASTIC INTAKE MANIFOLD FAILED, ANTIFREEZE LEAKING FROM AROUND THERMOSTAT DUE TO THIS FAILURE AND LEAKING INTO COIL PACKS AND CAUSING MAJOR MISFIRE IN MOTOR. HAPPENED SUDDENLY, NO INDICATION OF LEAK PRIOR TO THIS FAILURE. WAS DRIVING WHEN THIS HAPPENED AND HAD TO CALL FOR HELP TO GET VEHICLE BACK HOME, AND NOW CAN'T DRIVE IT . COST TO FIX IS EXPENSIVE, AND THE CAR RAN GREAT UNTIL THIS HAPPENED. SOUNDED LIKE I HAS THROWN A ROD, POPPING LOUDER ON EXCELERATION, SO I IMMEDIATELY PARKED IT AND TURNED OFF THE MOTOR.
NHTSA complaint #10979720 — an unverified report by a vehicle owner.
at 118,000 milesOoltewah, TN
EXTERIOR LIGHTING
INTAKE MANIFOLD FAILED (BURNED AND DISINTEGRATED IN THE AREA OF THE THERMOSTAT ) AND HAD TO BE REPLACED AT CONSIDERABLE EXPENSE . PRESENTLY THE SPEEDOMETER FAILS INTERMITTENTLY DROPPING TO ZERO AT RANDOM MOMENTS. MOST IMPORTANTLY THE LIGHTS CUT OUT INTERMITTENTLY USUALLY WHEN THE HEAT IS ON AND ON LONGER TRIPS. ALSO, MOST TIMES IT HAS HAPPENED WHEN IT HAS BEEN RAINING AND COLDER. DROVE UPWARDS OF 40 MILES WITH THE HEADLIGHTS CUTTING OUT INTERMITTENTLY IN THE RAIN AND COLD, PROBLEM HAS CONTINUED TO RECUR BUT SEEMS TO BE RELATED POSSIBLY TO HAVING THE HEAT ON. I BELIEVE THE LIGHTING CONTROL MODULE IS LOCATED NEAR A HEATING OUTLET AND MAY BE SUFFERING A FAILURE AS A RESULT BUT THIS IS JUST SPECULATION. ALSO, PREVIOUSLY WHEN I HAD PULLED INTO A REST AREA FOR AWHILE, AFTER COOLING DOWN, THE PROBLEM WENT AWAY FOR A LITTLE WHILE THEN RESUMED AFTER ABOUT TEN MILES WITH THE HEAT ON. I BELIEVE IT IS BEING CAUSED BY THE EXCESSIVE HEAT THE LCM IS SUBJECTED TO BY VIRTUE OF THE AREA IN WHICH IT IS INSTALLED. THE LIGHTING CONTROL MODULE IS OF MOTOROLA MANUFACTURE WITH SIEMANS RELAYS INSIDE. THE PART HAS NUMEROUS NUMBERS ON IT , MOST PROMINENTLY: XW7T-13C788-AA , 6MX2794A01, 990429A, AND LIGHTING CONTROL 95M .OTHERS ONLINE WITH SIMILAR VEHICLES (CROWN VICTORIAS) AND OF OTHER MODEL YEARS MANUFACTURED BY FORD HAVE REPORTED SIMILAR PROBLEMS AND THAT REPLACING THE RELAYS HAS RESOLVED THE ISSUE. I DO NOT KNOW THAT THIS PART IS THE SOURCE OF THE PROBLEM BUT SUSPECT IT AS MANY OTHERS ONLINE HAVE REPORTED THAT THIS PART WAS THE SOURCE OF THEIR PROBLEMS.
NHTSA complaint #10972145 — an unverified report by a vehicle owner.
at 118,000 milesOoltewah, TN
ELECTRICAL SYSTEM
INTAKE MANIFOLD FAILED (BURNED AND DISINTEGRATED IN THE AREA OF THE THERMOSTAT ) AND HAD TO BE REPLACED AT CONSIDERABLE EXPENSE . PRESENTLY THE SPEEDOMETER FAILS INTERMITTENTLY DROPPING TO ZERO AT RANDOM MOMENTS. MOST IMPORTANTLY THE LIGHTS CUT OUT INTERMITTENTLY USUALLY WHEN THE HEAT IS ON AND ON LONGER TRIPS. ALSO, MOST TIMES IT HAS HAPPENED WHEN IT HAS BEEN RAINING AND COLDER. DROVE UPWARDS OF 40 MILES WITH THE HEADLIGHTS CUTTING OUT INTERMITTENTLY IN THE RAIN AND COLD, PROBLEM HAS CONTINUED TO RECUR BUT SEEMS TO BE RELATED POSSIBLY TO HAVING THE HEAT ON. I BELIEVE THE LIGHTING CONTROL MODULE IS LOCATED NEAR A HEATING OUTLET AND MAY BE SUFFERING A FAILURE AS A RESULT BUT THIS IS JUST SPECULATION. ALSO, PREVIOUSLY WHEN I HAD PULLED INTO A REST AREA FOR AWHILE, AFTER COOLING DOWN, THE PROBLEM WENT AWAY FOR A LITTLE WHILE THEN RESUMED AFTER ABOUT TEN MILES WITH THE HEAT ON. I BELIEVE IT IS BEING CAUSED BY THE EXCESSIVE HEAT THE LCM IS SUBJECTED TO BY VIRTUE OF THE AREA IN WHICH IT IS INSTALLED. THE LIGHTING CONTROL MODULE IS OF MOTOROLA MANUFACTURE WITH SIEMANS RELAYS INSIDE. THE PART HAS NUMEROUS NUMBERS ON IT , MOST PROMINENTLY: XW7T-13C788-AA , 6MX2794A01, 990429A, AND LIGHTING CONTROL 95M .OTHERS ONLINE WITH SIMILAR VEHICLES (CROWN VICTORIAS) AND OF OTHER MODEL YEARS MANUFACTURED BY FORD HAVE REPORTED SIMILAR PROBLEMS AND THAT REPLACING THE RELAYS HAS RESOLVED THE ISSUE. I DO NOT KNOW THAT THIS PART IS THE SOURCE OF THE PROBLEM BUT SUSPECT IT AS MANY OTHERS ONLINE HAVE REPORTED THAT THIS PART WAS THE SOURCE OF THEIR PROBLEMS.
NHTSA complaint #10972145 — an unverified report by a vehicle owner.
at 118,000 milesOoltewah, TN
ENGINE
INTAKE MANIFOLD FAILED (BURNED AND DISINTEGRATED IN THE AREA OF THE THERMOSTAT ) AND HAD TO BE REPLACED AT CONSIDERABLE EXPENSE . PRESENTLY THE SPEEDOMETER FAILS INTERMITTENTLY DROPPING TO ZERO AT RANDOM MOMENTS. MOST IMPORTANTLY THE LIGHTS CUT OUT INTERMITTENTLY USUALLY WHEN THE HEAT IS ON AND ON LONGER TRIPS. ALSO, MOST TIMES IT HAS HAPPENED WHEN IT HAS BEEN RAINING AND COLDER. DROVE UPWARDS OF 40 MILES WITH THE HEADLIGHTS CUTTING OUT INTERMITTENTLY IN THE RAIN AND COLD, PROBLEM HAS CONTINUED TO RECUR BUT SEEMS TO BE RELATED POSSIBLY TO HAVING THE HEAT ON. I BELIEVE THE LIGHTING CONTROL MODULE IS LOCATED NEAR A HEATING OUTLET AND MAY BE SUFFERING A FAILURE AS A RESULT BUT THIS IS JUST SPECULATION. ALSO, PREVIOUSLY WHEN I HAD PULLED INTO A REST AREA FOR AWHILE, AFTER COOLING DOWN, THE PROBLEM WENT AWAY FOR A LITTLE WHILE THEN RESUMED AFTER ABOUT TEN MILES WITH THE HEAT ON. I BELIEVE IT IS BEING CAUSED BY THE EXCESSIVE HEAT THE LCM IS SUBJECTED TO BY VIRTUE OF THE AREA IN WHICH IT IS INSTALLED. THE LIGHTING CONTROL MODULE IS OF MOTOROLA MANUFACTURE WITH SIEMANS RELAYS INSIDE. THE PART HAS NUMEROUS NUMBERS ON IT , MOST PROMINENTLY: XW7T-13C788-AA , 6MX2794A01, 990429A, AND LIGHTING CONTROL 95M .OTHERS ONLINE WITH SIMILAR VEHICLES (CROWN VICTORIAS) AND OF OTHER MODEL YEARS MANUFACTURED BY FORD HAVE REPORTED SIMILAR PROBLEMS AND THAT REPLACING THE RELAYS HAS RESOLVED THE ISSUE. I DO NOT KNOW THAT THIS PART IS THE SOURCE OF THE PROBLEM BUT SUSPECT IT AS MANY OTHERS ONLINE HAVE REPORTED THAT THIS PART WAS THE SOURCE OF THEIR PROBLEMS.
NHTSA complaint #10972145 — an unverified report by a vehicle owner.
at 200,000 milesVidalia, GA
SUSPENSION
TL* THE CONTACT OWNS A 1999 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT THE BALL JOINTS WERE REPLACED BUT THE BOLT THAT HELD IT IN PLACE WAS LOOSE AND CAUSED THE CARTER KEY TO FAIL TO HOLD THE BOLT IN PLACE. AS A RESULT, THE BOLT NECK DETACHED WHILE THE CONTACT WAS DRIVING APPROXIMATELY 20 MPH AND CAUSED THE VEHICLE TO STOP ABRUPTLY. AS A RESULT, THE CONTACT'S HEAD HIT THE STEERING WHEEL. THE CONTACT SUFFERED A WHIP LASH THAT REQUIRED A MEDICAL ATTENTION. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS REPAIRED BY THE CONTACT WHO WAS AN INDEPENDENT MECHANIC. THE FAILURE MILEAGE WAS APPROXIMATELY 200,000.
NHTSA complaint #10958417 — an unverified report by a vehicle owner.
at 100,000 milesLOS Angeles, CA
EXTERIOR LIGHTING
AT NIGHT WHILE DRIVING HEADLIGHTS AND DASHBOARD LIGHTS WENT OUT ON FREEWAY AND COULD NOT BE TURNED ON AGAIN. HAS HAPPENED ON TWO OCCASIONS AND VEHICLE CANNOT BE DRIVEN AND UNSAFE.
NHTSA complaint #10916836 — an unverified report by a vehicle owner.
at 100,000 milesLOS Angeles, CA
ELECTRICAL SYSTEM
AT NIGHT WHILE DRIVING HEADLIGHTS AND DASHBOARD LIGHTS WENT OUT ON FREEWAY AND COULD NOT BE TURNED ON AGAIN. HAS HAPPENED ON TWO OCCASIONS AND VEHICLE CANNOT BE DRIVEN AND UNSAFE.
NHTSA complaint #10916836 — an unverified report by a vehicle owner.
NEW Philadelphia, OH
SEAT BELTS
SEAT BELTS FRONT BOTH SIDES,NOTHING BUT THE RETRACTER STICKS,SLOW MOVING LAP&SHOLD. STEERING SHAFT SEPARATES,RATTLES WHEN HITTING BUMPS HARD.
NHTSA complaint #10898106 — an unverified report by a vehicle owner.
NEW Philadelphia, OH
STEERING
SEAT BELTS FRONT BOTH SIDES,NOTHING BUT THE RETRACTER STICKS,SLOW MOVING LAP&SHOLD. STEERING SHAFT SEPARATES,RATTLES WHEN HITTING BUMPS HARD.
NHTSA complaint #10898106 — an unverified report by a vehicle owner.
Tulare, CA
SEAT BELTS
THE PASSENGERS SIDE SEAT BEAT COMES UNDONE AT TIMES AND THE SPEED SENSOR WORKS INTERMITTENTLY AND IT LEAKS GAS FROM AROUND THE FUEL PUMP
NHTSA complaint #10870118 — an unverified report by a vehicle owner.
Tulare, CA
VEHICLE SPEED CONTROL
THE PASSENGERS SIDE SEAT BEAT COMES UNDONE AT TIMES AND THE SPEED SENSOR WORKS INTERMITTENTLY AND IT LEAKS GAS FROM AROUND THE FUEL PUMP
NHTSA complaint #10870118 — an unverified report by a vehicle owner.
Tulare, CA
FUEL/PROPULSION SYSTEM
THE PASSENGERS SIDE SEAT BEAT COMES UNDONE AT TIMES AND THE SPEED SENSOR WORKS INTERMITTENTLY AND IT LEAKS GAS FROM AROUND THE FUEL PUMP
NHTSA complaint #10870118 — an unverified report by a vehicle owner.
at 133,596 milesVersaiklles, MO
EXTERIOR LIGHTING
TL* THE CONTACT OWNS A 1999 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT WHILE DRIVING AT APPROXIMATELY 35 MPH, THE LOW BEAM HEADLIGHTS FAILED INTERMITTENTLY. THE CONTACT MENTIONED THAT THE HEADLIGHTS WOULD ACTIVATE AND DEACTIVATE INDEPENDENTLY. THE VEHICLE WAS TAKEN TO THE DEALER WHERE IT WAS DIAGNOSED THAT THE CONTROL MODULE WAS DAMAGED AND NEEDED REPLACEMENT. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE MILEAGE WAS 133,596.
NHTSA complaint #10817529 — an unverified report by a vehicle owner.
at 140,000 milesSalt Lake City, UTCrash2 injured
STEERING
WHILE DRIVING ON THE EXPRESSWAY, THE VEHICLE SUDDENLY CHANGED LANES AND THE STEERING BECAME ERRATIC. UPON EXAMINATION, THE IDLER ARM HAD SEPARATED FROM THE STEERING LINK ARM. THERE WAS NO WARNING AND THE VEHICLE HAD RECENTLY PASSED A SAFETY INSPECTION.
NHTSA complaint #10786786 — an unverified report by a vehicle owner.