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
Complaints by component
One complaint can cite several components
- Engine and engine cooling29
- Exterior lighting20
- Steering19
- Suspension19
- Electrical system18
- Vehicle speed control17
- Service brakes, hydraulic13
- Tires12
- Power train11
- Visibility11
- Structure10
- Seat belts9
- Equipment8
- 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
When complaints were filed
Does it get worse with age? Complaints per calendar year filed
3
29
38
18
20
5
6
17
5
9
3
3
4
8
2
3
3
3
5
5
3
2
1
0
1
1
View as table
| Model year | Complaints filed per calendar year |
|---|---|
| 1998 | 3 |
| 1999 | 29 |
| 2000 | 38 |
| 2001 | 18 |
| 2002 | 20 |
| 2003 | 5 |
| 2004 | 6 |
| 2005 | 17 |
| 2006 | 5 |
| 2007 | 9 |
| 2008 | 3 |
| 2009 | 3 |
| 2010 | 4 |
| 2011 | 8 |
| 2012 | 2 |
| 2013 | 3 |
| 2014 | 3 |
| 2015 | 3 |
| 2016 | 5 |
| 2017 | 5 |
| 2018 | 3 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 0 |
| 2022 | 1 |
| 2023 | 1 |
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.
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.”
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.”
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”
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.”
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.”
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”
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.