2006 Mercury Grand Marquis Transmission and drivetrain Problems
- Complaints
- 4about this part
- Share
- 3%of 143 total for the year
- Median mileage
- 28,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the transmission and drivetrain of the 2006 Mercury Grand Marquis, 3% of the 143 complaints for this model year. Where a mileage was given, the median is 28,500 miles.
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.
“Sporadically and without warning, my cruise control will activate causing the vehicle to immediately accelerate. I had been using the control but had de-activated it but depressing the brake which leaves the unit on but not activated.”
NHTSA complaint #10314250, filed 2010-02, 40,000 miles“I have had 37 instances of engine acceleration when I brake with my 2006 Mercury Grand Marquis. The first instance was in may, 2007. I depress the brake pedal, and the engine first slows to approx 850 - 900 RPM then begins running up to over 2500 RPM. The dealer says I'm hitting the brake and the gas at the same time. I've tried doing that and it is extremely difficult. I suspect a computer malfunction where the braking is triggering a computer-initiated engine acceleration.”
NHTSA complaint #10307743, filed 2010-02, 17,000 miles“- the contact owns a 2006 Mercury Grand Marquis. When the engine was started it would rev very high. When the brakes were applied the vehicle would abruptly go into drive. The failure occurred intermittently. There were no warning indicators. The ford dealer was unable to diagnose or duplicate the failure. The failure mileage was approximately 200 miles, and the current mileage was 11,000 miles.”
NHTSA complaint #10187805, filed 2007-04, 200 miles“The contact owns a 2006 Mercury Grand Marquis. The contact stated that while stopped at a stop sign and attempting to accelerate, the vehicle failed to accelerate as intended. The contact stated that there was a loud clanking sound coming from the vehicle. The vehicle was towed to an independent mechanic where it was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 85,000.”
NHTSA complaint #11638054, filed 2025-01, 85,000 milesRelated service bulletins
- 10029205Jun 1, 2009Ford/mercury/lincoln: vehicles may exhibit one or more of the following symptoms: drive away hesitation, loss of rpm on deceleration, difficulty starting, and/or idle rpm less…
- 10021058Aug 25, 2006Transmission oil cooler bypass valve inspection - program expiration extension.
- 10020107May 1, 2006Transmission oil cooler (toc) bypass valve that may stick in the closed position, inhibiting transmission cooling and potentially causing the transmission to overheat. Customer…
Transmission and drivetrain: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2010 | 2 | 8% |
| 2009 | 2 | 8% |
| 2008 | 3 | 4% |
| 2007 | 5 | 5% |
| 2006 | 4 | 3% |
| 2005 | 5 | 1% |
| 2004 | 9 | 3% |
| 2003 | 12 | 3% |
| 2002 | 1 | 1% |
| 2001 | 13 | 8% |
| 2000 | 6 | 4% |
| 1999 | 12 | 7% |
| 1998 | 8 | 6% |
| 1997 | 12 | 4% |
| 1996 | 15 | 6% |
| 1995 | 11 | 6% |
| 1994 | 18 | 12% |
| 1993 | 29 | 20% |
| 1992 | 29 | 11% |
| 1991 | 8 | 10% |
| 1990 | 6 | 11% |
| 1989 | 6 | 10% |
| 1988 | 4 | 5% |
| 1987 | 1 | 2% |
| 1986 | 1 | 5% |
| 1985 | 1 | 5% |
| 1983 | 3 | 43% |
Other parts of the 2006 Mercury Grand Marquis
37 complaintsVehicle speed control
37 complaintsSeat belts
22 complaintsFuel system
13 complaintsSteering
13 complaintsBrakes
12 complaintsElectrical system
8 complaintsEngine
8 complaintsBody and structure
8 complaintsExterior lighting
6 complaintsOther or unknown
5 complaintsVisibility (wipers, defrost, mirrors)
4 complaints
← All problems reported for the 2006 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