1991 Mercury Grand Marquis Vehicle speed control Problems
- Complaints
- 12about this part
- Share
- 15%of 82 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 12 complaints about the vehicle speed control of the 1991 Mercury Grand Marquis, 15% of the 82 complaints for this model year. 7 of these say a crash was involved, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“While driving on the highway with cruise control set stepped on the brakes, but they didn't deactivate the speed control. Turned vehicle off, and then back on, and that didn't help. Had to open the hood to disconnect the switch. Contacted dealer.”
NHTSA complaint #862764, filed 2000-05“During cold startup shifted into reverse vehicle surged rearward. When placing selector gear into neutral slipped to drive gear, surged forward. Ran into house, and wheels still spinning with both feet on braking pedal.”
NHTSA complaint #812785, filed 1997-06“Driver turned on ignition ,put transmission in reverse with foot still on brakes , the vehicle took off in reverse, hitting 4 vehicles, and then went forward hitting a building.”
NHTSA complaint #849101, filed 1999-09“Vehicle was parked and turned the vehicle on, shifted gear into drive, had foot on the brake pedal and the car lunged forward and hit a parked car. Nobody was injured.”
NHTSA complaint #823197, filed 1998-05“Vehicle was parked in parking lot, put the vehicle in gear, vehicle went into open throttle position, loss of control, impact 12:00 position, speed unknown.”
NHTSA complaint #984189, filed 1996-05Vehicle 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 1991 Mercury Grand Marquis
21 complaintsBrakes
13 complaintsAir bags
11 complaintsEngine cooling
10 complaintsTransmission and drivetrain
8 complaintsFuel system
4 complaintsBody and structure
4 complaintsExterior lighting
3 complaintsOther or unknown
3 complaintsVisibility (wipers, defrost, mirrors)
3 complaintsLatches, locks and linkages
2 complaintsSuspension
2 complaints
← All problems reported for the 1991 Mercury Grand Marquis
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 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