1999 Mercury Grand Marquis vehicle speed control problems
12 owner complaints filed with NHTSA name the vehicle speed control on the 1999 Mercury Grand Marquis — 7% of all complaints for this model year.
What owners report
“The passengers side seat beat comes undone at times and the speed sensor works intermittently and it leaks gas from around the fuel pump”
filed May 20, 2016
“My car was in drive at a business traffic intersection drive way on a slight hill with the brakes on when the engine surged and the car started to reverse while still in drive. I had to put considerable pressure on the brakes to stop it. I checked and the shift lever was still in drive. My car has…”
filed Dec 12, 2014
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% |
| 2003 Grand Marquis | 27 | 7% |
| 2002 Grand Marquis | 17 | 22% |
| 2001 Grand Marquis | 27 | 17% |
| 2000 Grand Marquis | 13 | 8% |
| 1998 Grand Marquis | 9 | 6% |
Other reported problem areas on the 1999 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.