Problems · NHTSA complaints

1996 Mercury Grand Marquis problems

Owners filed 275 complaints about the 1996 Mercury Grand Marquis with NHTSA between Apr 1996 and Mar 2023. The most-cited component is engine and engine cooling (95).

Complaints
275
Filed with NHTSA
Crashes
12
Reported by owners
Fires
20
Reported by owners
Injuries
21
People reported injured
Deaths
2
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Engine and engine cooling95
  2. Service brakes, hydraulic27
  3. Steering24
  4. Vehicle speed control21
  5. Fuel system, gasoline21
  6. Exterior lighting20
  7. Suspension18
  8. Electrical system17
  9. Power train16
  10. Visibility14
  11. Air bags10
  12. Seat belts6
  13. Structure5
  14. Wheels3

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
199614
199733
199814
199920
200021
200117
200231
200334
200428
200512
20068
20078
200815
20094
20104
20112
20122
20130
20142
20151
20162
20171
20180
20190
20200
20210
20220
20232

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

95 reports9 fires
“A CRACK IN MY EXHAUST MANIFOLD BEHIND THE ALTERNATOR CAUSING COOLANT TO SPRAY ALL OVER UNDER MY HOOD AND NOW MY ENGINE OVERHEATS..THANKS FOR USING PLASTIC PARTS FORD . *TR”
Owner complaint to NHTSAFiled May 10, 2012Engine and engine coolingODI 10458067

Service brakes, hydraulic

27 reports2 crashes1 fire
“TL* THE CONTACT OWNS A 1996 MERCURY GRAND MARQUIS. THE CONTACT WAS DRIVING 30 MPH WHEN A VEHICLE ABRUPTLY PULLED IN FRONT OF HIM. THE CONTACT APPLIED THE BRAKES AND THE BRAKE PEDAL FELL INTO THE FLOORBOARD AND DID NOT ENGAGE. THE CONTACT WAS ABLE TO AVOID CRASHING INTO THE SECOND VEHICLE. THE VEHICLE WAS TOWED TO A LOCAL REPAIR FACILITY WHERE THE CONTACT WAS ADVISED THAT THE ENTIRE BRAKE LINE WOULD NEED REPLACING. THE VEHICLE WAS REPAIRED BY AN AUTHORIZED DEALER. THE FAILURE MILEAGE WAS 80,000 AND THE CURRENT MILEAGE WAS 81,000.”
Owner complaint to NHTSAFiled Aug 24, 2010Service brakes, hydraulicODI 10351534

Steering

24 reports1 related recall
“The contact owns a 1996 Mercury Grand Marquis. The contact stated while driving approximately 70 MPH at night, the headlights became inoperable. While driving for approximately 30 more miles and exiting the off ramp, the headlights started to flicker. The headlights momentarily worked but then became inoperable again. The instrument panel warning lights illuminated and were flashing. The contact also detected an abnormal clicking noise from the steering column. The contact stated that the windshield wipers became stuck in the on position. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The approximate failure mileage was 210,000.”
Owner complaint to NHTSAFiled Feb 22, 2023Steering, Exterior lighting, Electrical systemODI 11508567

Vehicle speed control

21 reports3 crashes4 fires2 related recalls
“TL* THE CONTACT OWNS A 1996 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT THE DEALER DISCONNECTED THE SPEED CONTROL DEACTIVATION SWITCH AS AN INTERIM REPAIR UNTIL THE INSTALLATION OF A FUSED WIRING HARNESS BECAME AVAILABLE FOR NHTSA CAMPAIGN NUMBER: 07V336000 (VEHICLE SPEED CONTROL). THE CONTACT STATED THAT THE VEHICLE WAS TAKEN BACK TO THE DEALER TO COMPLETE THE RECALL REPAIRS; HOWEVER, THE DEALER REFUSED TO HONOR THE RECALL REPAIR. AS A RESULT, THE CONTACT WAS UNABLE TO ACTIVE THE SPEED CONTROL ACTIVATION SWITCH. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND INFORMED THAT THE VEHICLE WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 08V051000 (VEHICLE SPEED CONTROL). THE FAILURE MILEAGE WAS 114,000. ....UPDATED 07/22/15 *BF UPDATED 10/11/2017*CN”
Owner complaint to NHTSAFiled Apr 30, 2015Vehicle speed controlODI 10713897

Fuel system, gasoline

21 reports
“THE AFFECED ENGINE IS THE 4.6L ENGINE WITH THE DEFECTIVE PLASTIC INTAKE MANIFOLD PART NUMBER F8AZ-9424-BC* INSTALLED IN 1996 AND UP ALL CROWN VICS,GRAND MARQUIS AND TOWN CARS. *AK THIS IS A VERY SERIOUS SAFETY ISSUE. CONSIDER A FAMILY OF 6 TRAVELING AN INTERSTATE, AT HIGHWAY SPEEDS, WHEN THE DEFECTIVE INTAKE MANIFOLD GIVES OUT AND A RAPID LOSS OF COOLANT OCCURS. THE DRIVER PANICS AND TRIES TO GET TO THE RIGHT SHOULDER, ONLY TO BE HIT BY AN 18-WHEELER. OR THE DRIVER GETS TO THE RIGHT SHOULDER AND A HIGHWAY PATROLMAN STOPS TO RENDER ASSISTANCE AND EVENTUALLY, A TOW TRUCK SHOWS UP TO TOW THE VEHICLE. ALL THESE PEOPLE ARE IN HARMS WAY, BECAUSE THE DEFECTIVE INTAKE MANIFOLD WAS NOT PUT ON THE RECALL LIST. DO WE HAVE TO WAIT FOR PEOPLE TO DIE OR ARE SERIOUSLY INJURED, BEFORE THE FORD MOTOR COMPANY WILL FINALLY EXTEND THEIR RECALL NOTICE, FROM CERTAIN FORD CROWN VICTORIAS TO ALL VEHICLES HAVING THIS DEFECTIVE INTAKE MANIFOLD? THE DRIVING PUBLIC NEEDS YOUR HELP IN GETTING THE FORD MOTOR COMPANY TO EXTEND THEIR RECALL NOTICE TO INCLUDE ALL FORD PRODUCTS HAVING THIS DEFECTIVE INTAKE MANIFOLD. VISIT THE FOLLOWING WEB SITES, FOR COMPLETE DETAILS OF THE PROBLEM, I WANT TO…”
Owner complaint to NHTSAFiled Dec 6, 2004Fuel system, gasolineODI 10102207

Exterior lighting

20 reports
“The contact owns a 1996 Mercury Grand Marquis. The contact stated while driving approximately 60 MPH the instrument panel began started flashing off and on before going black. The contact stated that he was headed to an off ramp the head lights stopped functioning. The contact stated no warning light was illuminated. The contact had stopped driving the vehicle for several days and then tested the head lights and stated that the functionality had returned. The contact had not taken the vehicle to a dealer or independent mechanic. The vehicle was not diagnosed or repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 225,000.”
Owner complaint to NHTSAFiled Mar 1, 2023Electrical system, Exterior lightingODI 11509717
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.