2003 Mercury Marquis Vehicle speed control Problems
- Complaints
- 5about this part
- Share
- 15%of 33 total for the year
- Median mileage
- 28,398miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the vehicle speed control of the 2003 Mercury Marquis, 15% of the 33 complaints for this model year. Where a mileage was given, the median is 28,398 miles. 1 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.
“In firestone store parking area perpendicular to service for attendant to fill the rt frt tire. Pulled up to attendant , applied brakes and veh surged ahead, struggled to control to no avail. Made diffucult u turn to avoid drv into street traffic, crashed other veh, cont'd on jumping 2 inside pk curbs stopping as frame stopped res on curb”
NHTSA complaint #11071861, filed 2018-02, 60,000 miles“Dt: the contact complained about intermittent sudden acceleration. It occurred when the climate was hot, and the engine was warm. When taking foot off of the accelerator to move it to the brake pedal the engine revved and the ripens warehouse. The dealer completed diagnostic testing, and the problem could not be duplicated. No repairs have been made.”
NHTSA complaint #10145457, filed 2005-12, 100 miles“Accelerator pedal and brake pedal are located too close together. This would cause a misapplication to the wrong pedal when braking or accelerating, at the same time. Had taken vehicle to dealership, and mechanic could not resolve the problem.”
NHTSA complaint #10038260, filed 2003-09, 6,797 miles“The contact stated while attempting to apply brake pressure the vehicle accelerated. The dealership was alerted however no repairs have been made. The consumer believed the brake and accelerator were designed too close together. Updated 04/06/06.”
NHTSA complaint #10152022, filed 2006-03, 50,000 milesVehicle speed control: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2003 | 5 | 15% |
| 2002 | 1 | 9% |
| 2001 | 3 | 12% |
| 2000 | 2 | 9% |
| 1999 | 4 | 17% |
| 1998 | 2 | 7% |
| 1997 | 4 | 8% |
| 1996 | 2 | 6% |
| 1995 | 3 | 15% |
| 1994 | 8 | 27% |
| 1993 | 4 | 17% |
| 1992 | 5 | 21% |
| 1991 | 2 | 22% |
| 1990 | 1 | 17% |
| 1989 | 1 | 10% |
| 1988 | 1 | 11% |
| 1985 | 1 | 20% |
Other parts of the 2003 Mercury Marquis
8 complaintsBrakes
4 complaintsElectrical system
4 complaintsSteering
4 complaintsSuspension
4 complaintsBody and structure
3 complaintsAir bags
2 complaintsEngine cooling
2 complaintsFuel system
2 complaintsVisibility (wipers, defrost, mirrors)
2 complaintsEquipment
1 complaints
← All problems reported for the 2003 Mercury 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