2003 Mercury Grand Marquis vehicle speed control problems
27 owner complaints filed with NHTSA name the vehicle speed control on the 2003 Mercury Grand Marquis — 7% of all complaints for this model year.
What owners report
“I started Mercury with foot on break like normal. Shifted into reverse. Car accelerated backwards at full speed. Brakes did not stop car. Attempted to shift into neutral but went into drive instead. Car accelerated forward at full speed with my foot still on break. Car hit metal post and tree…”
filed Jan 20, 2023
“Unexpected acceleration when car is stopped at a light, car lunges forward. On one occasion the car was burning rubber . Very dangerous and scary. Have to shut off ignition when this happens. Has occurred several times. My wife refuses to ride in the vehicle.”
filed Feb 4, 2016
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Vehicle Speed Control problems in other Grand Marquis years
| Year | Reports | Share |
|---|---|---|
| 2010 Grand Marquis | 3 | 13% |
| 2009 Grand Marquis | 4 | 15% |
| 2008 Grand Marquis | 15 | 19% |
| 2007 Grand Marquis | 13 | 14% |
| 2006 Grand Marquis | 37 | 26% |
| 2005 Grand Marquis | 39 | 8% |
| 2004 Grand Marquis | 23 | 7% |
| 2002 Grand Marquis | 17 | 22% |
| 2001 Grand Marquis | 27 | 17% |
| 2000 Grand Marquis | 13 | 8% |
| 1999 Grand Marquis | 12 | 7% |
| 1998 Grand Marquis | 9 | 6% |
Other reported problem areas on the 2003 Mercury Grand Marquis
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.