MERCURY GRAND MARQUIS · model year

1999 MERCURY GRAND MARQUIS

202 NHTSA complaints, 21 crash reports for this specific cohort.

NHTSA overall rating

Not crash-tested

New Car Assessment Program

The 1999MERCURYGRAND MARQUIS carries 202 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 21 crashes, 2 fires, 14 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.

Component-level analysis is where model-year complaints become actionable: the top complaint category for the 1999 GRAND MARQUIS is exterior lighting with 12 filings, followed by engine and engine cooling (11) and vehicle speed control (8). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability.

NHTSA currently has 3 investigation files overlapping the 1999 GRAND MARQUIS. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.

202
Complaints
21
Crashes
2
Fires
14
Injuries
0
Deaths

Total Complaints

202 filings

Crashes Reported

21 reports

Source

NHTSA ODI

Federal complaints database

Complaints vs. fleet median (215)

At or below the fleet median complaint volume.

Complaints by Component

ComponentCount
EXTERIOR LIGHTING12
ENGINE AND ENGINE COOLING11
VEHICLE SPEED CONTROL8
EXTERIOR LIGHTING:HEADLIGHTS7
TIRES7
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE7
ENGINE7
SUSPENSION6
ELECTRICAL SYSTEM6
SEAT BELTS5
POWER TRAIN:AUTOMATIC TRANSMISSION5
AIR BAGS:FRONTAL5
SUSPENSION:FRONT5
STEERING: STEERING WHEEL/HANDLE BAR5
STEERING5

Recent Complaints

20230713CrashSEAT 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.

20220125ENGINE 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.

Mileage: 120,000

20200718EXTERIOR 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.

Mileage: 160,000

20191108STEERING

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

Mileage: 154,850

20190410ENGINE

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

Mileage: 112,004

20180830EXTERIOR 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.

Mileage: 160,000

20180618ELECTRICAL 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.

Mileage: 155,000

20180618EXTERIOR 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.

Mileage: 155,000

20180105ENGINE

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.

Mileage: 135,000

20171002EXTERIOR 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).

Mileage: 160,000

20170824EXTERIOR 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.

Mileage: 134,000

20170421ENGINE

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.

Mileage: 185,000

20170412ELECTRICAL 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

Mileage: 118,000

20170412ENGINE

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

Mileage: 118,000

20170412EXTERIOR 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

Mileage: 118,000

20170303SUSPENSION

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.

Mileage: 200,000

20161018ELECTRICAL 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. *TR

Mileage: 100,000

20161018EXTERIOR 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. *TR

Mileage: 100,000

20160823SEAT BELTS

SEAT BELTS FRONT BOTH SIDES,NOTHING BUT THE RETRACTER STICKS,SLOW MOVING LAP&SHOLD. STEERING SHAFT SEPARATES,RATTLES WHEN HITTING BUMPS HARD.

20160823STEERING

SEAT BELTS FRONT BOTH SIDES,NOTHING BUT THE RETRACTER STICKS,SLOW MOVING LAP&SHOLD. STEERING SHAFT SEPARATES,RATTLES WHEN HITTING BUMPS HARD.

Compare 1999MERCURYGRAND MARQUIS to Similar Vehicles

NHTSA Investigations

Frequently Asked Questions

How many complaints does the 1999 MERCURY GRAND MARQUIS have?
The 1999 MERCURY GRAND MARQUIS has 202 NHTSA complaints, 21 crashes, 2 fires, 14 injuries, and 0 deaths reported.
What are the most common problems with the 1999 MERCURY GRAND MARQUIS?
The most-complained component for the 1999 MERCURY GRAND MARQUIS is EXTERIOR LIGHTING with 12 complaints. Other frequently reported areas include ENGINE AND ENGINE COOLING and VEHICLE SPEED CONTROL.
Is the 1999 MERCURY GRAND MARQUIS safe to buy?
Review the complaint history, crash and fire reports, safety ratings, and recall status on this page to make an informed decision. No NHTSA crash test rating is available for this model year. Compare with other model years using the links above.
Where does this data come from?
All complaint, recall, and safety rating data is sourced from the National Highway Traffic Safety Administration (NHTSA). Complaints are filed by vehicle owners through NHTSA's Office of Defects Investigation.

Vehicle Safety Guides

Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.