1989 Mercury Grand Marquis Vehicle speed control Problems
- Complaints
- 14about this part
- Share
- 24%of 58 total for the year
- Median mileage
- 64,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 14 complaints about the vehicle speed control of the 1989 Mercury Grand Marquis, 24% of the 58 complaints for this model year. Where a mileage was given, the median is 64,000 miles. 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.
“Dt: the consumer owns a 1989 Mercury Grand Marquis. The engine revved up which caused the vehicle to move forward while he had his foot on the brake. The first time this incident happened it did not cause an accident, but the second occurrence, he rear ended another vehicle.”
NHTSA complaint #10121626, filed 2005-07“Consumer experiencing problem with vehicle acceleration. While pulling into an inter section, waiting on traffic light to change, vehicle started to accelerate. Consumer pressed down on brakes to prevent vehicle from hitting another vehicle. Consumer was able to change gear into neutral, and tapping on accelerator pedal was able to disengage the acceleration. Also cruise control was not engaged at the time. Dealer/mfr. Notified and refused to accept responsibility. Can NHTSA help in this matter.”
NHTSA complaint #835232, filed 1999-03“In only 3 occurrences when starting vehicle, it would leap forward unexpectedly which may cause an accident. Dealer cannot determine problem. Please provide further information.”
NHTSA complaint #834750, filed 1999-02Vehicle 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 1989 Mercury Grand Marquis
16 complaintsBrakes
6 complaintsEngine cooling
6 complaintsTransmission and drivetrain
6 complaintsFuel system
5 complaintsTires
3 complaintsBody and structure
2 complaintsLatches, locks and linkages
1 complaintsSeat belts
1 complaintsSteering
1 complaints
← All problems reported for the 1989 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