Problems · NHTSA complaints

1999 Mercury Grand Marquis problems

Owners filed 197 complaints about the 1999 Mercury Grand Marquis with NHTSA between Sep 1998 and Jul 2023. The most-cited component is engine and engine cooling (29).

Complaints
197
Filed with NHTSA
Crashes
22
Reported by owners
Fires
3
Reported by owners
Injuries
19
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Engine and engine cooling29
  2. Exterior lighting20
  3. Steering19
  4. Suspension19
  5. Electrical system18
  6. Vehicle speed control17
  7. Service brakes, hydraulic13
  8. Tires12
  9. Power train11
  10. Visibility11
  11. Structure10
  12. Seat belts9
  13. Equipment8
  14. Air bags8

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Nov 9, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
19983
199929
200038
200118
200220
20035
20046
200517
20065
20079
20083
20093
20104
20118
20122
20133
20143
20153
20165
20175
20183
20192
20201
20210
20221
20231

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Engine and engine cooling

29 reports1 fire
“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.”
Owner complaint to NHTSAFiled Jan 25, 2022Engine and engine coolingODI 11448881

Exterior lighting

20 reports
“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.”
Owner complaint to NHTSAFiled Jul 18, 2020Exterior lightingODI 11340109

Steering

19 reports1 crash1 related recall
“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”
Owner complaint to NHTSAFiled Nov 8, 2019SteeringODI 11278876

Suspension

19 reports
“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.”
Owner complaint to NHTSAFiled Mar 3, 2017SuspensionODI 10958417

Electrical system

18 reports2 fires
“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.”
Owner complaint to NHTSAFiled Jun 18, 2018Electrical system, Exterior lightingODI 11102426

Vehicle speed control

17 reports7 crashes
“MY CAR WAS IN DRIVE AT A BUSINESS TRAFFIC INTERSECTION DRIVE WAY ON A SLIGHT HILL WITH THE BRAKES ON WHEN THE ENGINE SURGED AND THE CAR STARTED TO REVERSE WHILE STILL IN DRIVE. I HAD TO PUT CONSIDERABLE PRESSURE ON THE BRAKES TO STOP IT. I CHECKED AND THE SHIFT LEVER WAS STILL IN DRIVE. MY CAR HAS BEEN PROPERLY MAINTAINED AND WAS RECENTLY SERVICED WITH ALL REQUIRED SERVICES DONE. THIS REALLY SCARED ME AND I WOULD HAVE CRASHED INTO A CAR IF IT WAS BEHIND ME. FORD SHOULD LOOK INTO THIS SAFETY PROBLEM. *TR”
Owner complaint to NHTSAFiled Dec 12, 2014Engine and engine cooling, Vehicle speed controlODI 10663813
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 9, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.