Mercury Grand Marquis Vehicle Speed Control Problems
Owners have filed 305 complaints with NHTSA about vehicle speed control problems on the Mercury Grand Marquis across 16 model years. The 2005 model year has the most (39). The words owners use most often: “cruise control” (20% of reports).
- 305vehicle speed control complaints
- —median miles at failure
- 82mention a crash
- 36mention an injury
- 2related recalls
- 27%of reports with a speed happened at 50+ mph
What owners describe
Phrases that appear unusually often in these complaints compared with complaints about other cars.
- Cruise control: mentioned in 62 of 305 complaints (20%)
- Suddenly accelerated: mentioned in 22 of 305 complaints (7%)
- Sudden acceleration: mentioned in 17 of 305 complaints (6%)
- Foot brake: mentioned in 17 of 305 complaints (6%)
At what mileage do vehicle speed control problems happen?
Based on 183 complaints that reported the odometer reading.
How serious are the reports?
Of 305 complaints, 82 mention a crash, 18 a fire, 36 an injury.
Mercury Grand Marquis vehicle speed control complaints by model year
| Model year | Vehicle Speed Control complaints | Share of that year | Median miles |
|---|---|---|---|
| 2010 Grand Marquis | 3 | 12% | 56,100 |
| 2009 Grand Marquis | 4 | 15% | 24,000 |
| 2008 Grand Marquis | 15 | 19% | 27,000 |
| 2007 Grand Marquis | 13 | 14% | 39,000 |
| 2006 Grand Marquis | 37 | 26% | 38,000 |
| 2005 Grand Marquis | 39 | 8% | 17,908 |
| 2004 Grand Marquis | 23 | 7% | 39,036 |
| 2003 Grand Marquis | 27 | 7% | 25,000 |
| 2002 Grand Marquis | 17 | 22% | 48,500 |
| 2001 Grand Marquis | 27 | 17% | 50,000 |
| 2000 Grand Marquis | 13 | 8% | 98,900 |
| 1999 Grand Marquis | 12 | 7% | 102,500 |
| 1998 Grand Marquis | 9 | 6% | 60,000 |
| 1997 Grand Marquis | 24 | 8% | 113,000 |
| 1996 Grand Marquis | 19 | 8% | 98,000 |
| 1995 Grand Marquis | 23 | 13% | 124,676 |
When owners reported it
Related recalls (2)
Vehicle speed control:cruise control
Model years: 1995, 1996, 1997, 1998
Problem: Ford is recalling 225,000 my 1992-2003 econoline, my 1993-1995 taurus sho, my 1992-1998 crown victoria, my 1993 bronco, f-series, my 1995-1997 f-series super duty stripped chassis, my 1992-1998 mercury grand marquis, and my 1992-1995 lincoln town car vehicles. The affected vehicles were previously repaired using a wiring harness that is not compatible with the vehicle circuit polarity.
Risk: As a result, the fuse is located in the output circuit rather than in the intended input power feed circuit, and may not offer the intended protection in the event of an electrical short to ground.
Fix: Dealers will install a new wiring harness, or replace the mating electrical component. The recall began on february 18, 2008. Owners may contact ford at 1-800-392-3673.
Vehicle speed control
Model years: 1995, 1996, 1997, 1998
Problem: On certain pickup trucks, passenger vehicles, sport utility vehicles, and motor homes chassis, the speed control deactivation switch may, under certain conditions, leak internally and then overheat, smoke, or burn.
Risk: This could result in an underhood fire.
Fix: Dealers will install a fused wiring harness. Owners of the passenger cars included in this campaign will be instructed to return their vehicles to their dealers to have the speed control deactivation switch disconnected as an interim repair. As soon as repair parts are available (expected october 2007), owners will be instructed to return to the dealers for installation of a fused wiring harness. The recall began on august 13, 2007, and mailing completed by september 19, 2007. Owners may contact ford at 1-888-222-2751.
What owners report
Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.
The contact owns a 2002 Mercury Grand Marquis. The contact stated while driving 50 MPH at night, the cruise control mode malfunctioned, and the speed of the vehicle increased independently. The contact stated that the brake pedal was depressed several times to the floor, but the vehicle failed to…
This is a serious safety hazard that could result in death or injury. If I hadnât escaped in time, I would have been killed. I am urging the NHTSA to investigate this defect and take immediate action to remove these vehicles from the road. Others may not be as lucky. This issue is…
On [XXX] I was driving this recently purchased Grand marquis . On [XXX] here in San Antonio around ten at night I hit the brakes and something under the hood compartment blew up and it cocked the car . I was trapped inside and when I finally was able to get my seatbelt released I had to break the…
I was driving I pressed the cruise control to set it but the vehicle kept accelerating and as I was pressing on the brake it wouldnât disengage it kept accelerating I kept pressing the brake frantically and THANK GOD it disengaged.. I never touched the cruise control again
I started Mercury with foot on break like normal. Shifted into reverse. Car accelerated backwards at full speed. Brakes did not stop car. Attempted to shift into neutral but went into drive instead. Car accelerated forward at full speed with my foot still on break. Car hit metal post and tree…
Frequently asked questions
Do all Mercury Grand Marquiss have vehicle speed control problems?
No. NHTSA has 305 owner complaints about vehicle speed control for the Mercury Grand Marquis. Complaint data shows that the problem is reported, not how many of all cars sold are affected.
Was there a recall on the Mercury Grand Marquis vehicle speed control?
Yes: 2 safety recalls list vehicle speed control. Check your VIN on NHTSA.gov to see whether the fix was done on your car.
What do owners say about vehicle speed control problems on the Mercury Grand Marquis?
The most frequent phrase is “cruise control”, in 62 of 305 complaints, followed by “suddenly accelerated” (22).
Other Mercury Grand Marquis problems
- Exterior Lighting problems (853)
- Engine and Engine Cooling problems (359)
- Electrical System problems (312)
- Steering problems (309)
- Air Bags problems (189)
- Service Brakes, Hydraulic problems (172)
- Suspension problems (166)
- Seat Belts problems (136)
See all Mercury Grand Marquis problems.