1990 Mercury Grand Marquis Vehicle speed control Problems
- Complaints
- 9about this part
- Share
- 16%of 56 total for the year
- Median mileage
- 127,998miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 9 complaints about the vehicle speed control of the 1990 Mercury Grand Marquis, 16% of the 56 complaints for this model year. Where a mileage was given, the median is 127,998 miles. 5 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 at normal speed accelerator pedal went to the floor, and vehicle lost all power to go forward. Dealer notified. Consumer stated this vehicle was no longer under warranty. Transmission cost over $1000.00.”
NHTSA complaint #10027032, filed 2003-08, 127,998 miles“Speed control can on full force while backing which caused a crash, totalling the auto. Twice before speed control came on when braking. Is this a known problem ? Understand there was a tv show talking about similar failures. Can you furnish any information as wife had no control over vehicle.”
NHTSA complaint #708641, filed 1999-07“Owner had started vehicle & put foot on brakes before shifting into drive. Vehicle suddenly took off & hit a tree & then a building. A policeman had witnessed. The brake lights were on. No skid marks. Took to dealer & mechanic could not locate cause of sudden acceleration.”
NHTSA complaint #851438, filed 1999-11“Owner states when electric door system locks fail on front doors, there is no way of locking the car door from the inside. Possible design flaw. Plastic lock indicator breaks off when trying to lock the door from inside. Fuel injector failure limited the ability to accellerate the vehicle.”
NHTSA complaint #822143, filed 1998-03“Auto-tran: sudden acceleration while brake pedal is being depressed, totally without warning, happens just before coming to full stop, intermittent problem.”
NHTSA complaint #803093, filed 1996-10Vehicle 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 1990 Mercury Grand Marquis
13 complaintsAir bags
9 complaintsBrakes
8 complaintsTransmission and drivetrain
6 complaintsEngine cooling
3 complaintsBody and structure
3 complaintsFuel system
2 complaintsOther or unknown
2 complaintsVisibility (wipers, defrost, mirrors)
2 complaintsEngine
1 complaintsSeats
1 complaintsTires
1 complaints
← All problems reported for the 1990 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