Problems · NHTSA complaints
1998 Mercury Grand Marquis problems
Owners filed 177 complaints about the 1998 Mercury Grand Marquis with NHTSA between Feb 1998 and Mar 2021. The most-cited component is engine and engine cooling (31).
Complaints
177
Filed with NHTSA
Crashes
9
Reported by owners
Fires
8
Reported by owners
Injuries
9
People reported injured
Deaths
1
Reported to NHTSA
Complaints by component
One complaint can cite several components
- Engine and engine cooling31
- Suspension21
- Steering20
- Electrical system19
- Exterior lighting19
- Vehicle speed control12
- Structure12
- Tires10
- Power train10
- Service brakes, hydraulic9
- Fuel system, gasoline8
- Seat belts5
- Engine4
- Air bags4
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
20
46
17
13
12
10
7
12
5
5
2
2
3
4
2
2
2
4
4
0
3
0
1
1
View as table
| Model year | Complaints filed per calendar year |
|---|---|
| 1998 | 20 |
| 1999 | 46 |
| 2000 | 17 |
| 2001 | 13 |
| 2002 | 12 |
| 2003 | 10 |
| 2004 | 7 |
| 2005 | 12 |
| 2006 | 5 |
| 2007 | 5 |
| 2008 | 2 |
| 2009 | 2 |
| 2010 | 3 |
| 2011 | 4 |
| 2012 | 2 |
| 2013 | 2 |
| 2014 | 2 |
| 2015 | 4 |
| 2016 | 4 |
| 2017 | 0 |
| 2018 | 3 |
| 2019 | 0 |
| 2020 | 1 |
| 2021 | 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
31 reports2 fires
“TL*THE CONTACT OWNS A 1998 MERCURY MARQUIS. THE CONTACT STATED THAT WHILE DRIVING AT 40 MPH, THERE WAS SMOKE COMING FROM THE HOOD OF THE VEHICLE. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC, WHO DIAGNOSED THAT THE MANIFOLD AND THE THERMOSTAT HOLDER NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE VIN WAS NOT AVAILABLE. THE APPROXIMATE FAILURE MILEAGE WAS 130,000. UPDATED 3/24/15*CN THE CONSUMER STATED HE PULLED THE VEHICLE TO THE CURB, INSPECTED THE ENGINE AND NOTICED SMOKE COMING FROM A BROKEN PART, RELEASING ANTI-FREEZE. THE THERMOSTAT GASKET HOUSING AND INTAKE MANIFOLD WERE REPLACED. UPDATED 07/07/15*JB”
Suspension
21 reports3 crashes
“TL* THE CONTACT OWNS A 1998 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT WHILE EXAMINING HIS VEHICLE AT HIS RESIDENCE, HE NOTICED THE FRONT BALL JOINTS WERE DEFECTIVE. THE VEHICLE TAKEN TO EXPRESSWAY FORD OF MOUNT VERNON (3800 HIGHWAY 62 E, MOUNT VERNON, IN 47620) ON MAY 30 2020, WHERE THE VEHICLE WAS INSPECTED AND IT WAS DETERMINED THAT THE SHOCKS NEEDED TO BE REPLACED. THE FRONT SHOCKS WERE REPLACED HOWEVER, SEVERAL MONTHS LATER THE DRIVER'S SIDE SHOCK WAS LEAKING FLUID. THE VEHICLE WAS TAKEN BACK TO THE DEALER FOR REPAIRS. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 165,400.”
Steering
20 reports2 crashes1 related recall
“AUTOZONE- VALUCRAFT BRAND- BALL JOINTS PART NUMBER VFA2101 I RECENTLY HAD MY BALL JOINTS REPLACED AND I HAD A PREMATURE FAILURE OF THE BALL JOINT FASTENING HARDWARE WHILE DRIVING DOWN THE CITY ROAD IN A STRAIGHT LINE AT 45 MPH. IT CAUSED THOUSANDS OF DOLLARS OF DAMAGE AND IT ALSO ALMOST CAUSE ME GREAT INJURY. I SUSPECT AUTOZONE IS USING LOW GRADE NUTS CAUSE THE NUT THAT WAS ON THE BALL JOINT SHEARED OFF CAUSING ME TO BEND A CONTROL ARM, CRACK MY FRAME, BLOW A TIRE, ALL WHILE BARELY MISSING A TELEPHONE POLE. HAD I BEEN GOING DOWN THE HIGHWAY AT THE POSTED SPEED LIMIT I COULD HAVE FLIPPED MY CAR, GOT PULLED UNDER A SEMI, CROSS THE MEDIAN INTO ONCOMING TRAFFIC AND SO ON. I WOULD LIKE FOR AN INVESTIGATION TO BE STARTED ON THEIR POOR ENGINEERING CHOICES AND A RECALL TO BE STARTED. ITS JUST NOT FOR THE SAFETY OF ME BUT FOR THE SAFETY OF OTHER PEOPLE. I DO HAVE ALL DAMAGE PICTURES AND PICTURES OF THE FAILURE POINT. I HAVE PICTURES OF THE NUT IN QUESTION COMPARED TO ANOTHER COMPETITORS BRAND AND THERE IS A NOTICEABLE SIZE DIFFERENCE AND HARDNESS DIFFERENCE. THE BALL JOINTS WERE REPLACED 9/26/2015 AND FAILED ON 4/25/2016. AUTOZONE PART NUMBER VFA2101. MY BELIEF IS THE…”
Electrical system
19 reports4 fires
“TL* THE CONTACT OWNS A 1998 MERCURY GRAND MARQUIS. WHILE DRIVING VARIOUS SPEEDS, THE HEADLIGHTS AND INSTRUMENT PANEL LIGHTING FAILED TO ILLUMINATE. THE CONTACT STATED THAT THE FAILURE OCCURRED PERIODICALLY. THE VEHICLE WAS NOT TAKEN TO A DEALER OR INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING OR REPAIRS. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 109,000.”
Exterior lighting
19 reports
“TL* THE CONTACT OWNS A 1998 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT THE INTERIOR AND EXTERIOR LIGHTING OPERATED INTERMITTENTLY. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 165,784.”
Vehicle speed control
12 reports2 crashes2 fires2 related recalls
“TL* THE CONTACT OWNS A 1998 MERCURY MARQUIS. THE CONTACT STATED THAT WHILE DRIVING AT APPROXIMATELY 60 MPH, THE CRUISE CONTROL FAILED. THE FAILURE OCCURRED ON SEVERAL OCCASIONS. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 76,000.”
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.