2008 Mercury Grand Marquis Vehicle speed control Problems
- Complaints
- 15about this part
- Share
- 19%of 80 total for the year
- Median mileage
- 27,000miles
- Trend
- FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.
NHTSA recorded 15 complaints about the vehicle speed control of the 2008 Mercury Grand Marquis, 19% of the 80 complaints for this model year. Where a mileage was given, the median is 27,000 miles. 5 of these say a crash was involved and 1 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I was driving in town and several times when I slowed down to stop at a stop sign or corner, after braking my car accelerated by itself. The engine revved up and made the car jump forward. I had to slightly release the brake snd brake harder to stop and avoid going into the intersection.”
NHTSA complaint #11399994, filed 2021-03, 78,013 miles“I was preparing test drive 2008 Mercury marquis at honolulu ford. I was stopped at the exit to houghtailing st when the engine accelerate. I looked down and my foot was not on the gas it was on the brake. The car started to move out into the street crossing the road hitting another vehicle and a light pole.”
NHTSA complaint #10270015, filed 2009-05, 200 miles“Vehicle was purchased used in june, 2011. While braking for a stop light, vehicle suddenly accelerated. Had to forcefully pump brakes to stop vehicle from hitting vehicle in front. Car returned to normal operation as soon as I got it stopped. Have had similar incidents a couple of times before, although not as bad as this one, however, at that time I thought maybe I had accidentally pressed the accelerator while braking. I know that was not the case this time.”
NHTSA complaint #10535491, filed 2013-08, 56,150 miles“Cruise control, sudden acceleration. Car went to 80 before I could stop it vehicle is a 2008 Mercury Grand Marquis ls with 27,500 miles on it . The dealer replaced the ECM. This happened to my wife also at 35 MPH went to 65 before she stopped it.”
NHTSA complaint #10311873, filed 2010-02, 27,000 miles“When stepping on brake, motor raced up to 5000 RPM. ( like cruise control was engaging. Had to go to neutral pump the accelerator to bring RPM down. In a parking lot with both feet on the brake it pushed me 5 feet before I could get it under control.”
NHTSA complaint #10204160, filed 2007-09, 4 milesVehicle speed control: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2010 | 3 | 12% |
| 2009 | 4 | 15% |
| 2008 | 15 | 19% |
| 2007 | 13 | 14% |
| 2006 | 37 | 26% |
| 2005 | 39 | 8% |
| 2004 | 23 | 7% |
| 2003 | 27 | 7% |
| 2002 | 17 | 22% |
| 2001 | 27 | 17% |
| 2000 | 13 | 8% |
| 1999 | 12 | 7% |
| 1998 | 9 | 6% |
| 1997 | 24 | 8% |
| 1996 | 19 | 8% |
| 1995 | 23 | 13% |
| 1994 | 33 | 21% |
| 1993 | 19 | 13% |
| 1992 | 31 | 12% |
| 1991 | 12 | 15% |
| 1990 | 9 | 16% |
| 1989 | 14 | 24% |
| 1988 | 12 | 16% |
| 1987 | 7 | 16% |
| 1986 | 1 | 5% |
| 1985 | 4 | 19% |
| 1984 | 4 | 27% |
| 1983 | 1 | 14% |
Other parts of the 2008 Mercury Grand Marquis
23 complaintsBrakes
10 complaintsElectrical system
9 complaintsBody and structure
9 complaintsEngine cooling
5 complaintsExterior lighting
5 complaintsEngine
4 complaintsFuel system
4 complaintsAir bags
3 complaintsEquipment
3 complaintsOther or unknown
3 complaintsSeat belts
3 complaints
← All problems reported for the 2008 Mercury Grand Marquis
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology