2009 Mercury Grand Marquis Fuel system Problems
- Complaints
- 3about this part
- Share
- 12%of 26 total for the year
- Median mileage
- 35,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the fuel system of the 2009 Mercury Grand Marquis, 12% of the 26 complaints for this model year. Where a mileage was given, the median is 35,000 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.
“I was driving at 45 MPH and applied the brake to stop. The engine revved to 2,000 RPM. I was able to stop with very hard braking using both feet. The engine continue revving at 2,000 RPM even after the car had stopped. I placed the transmission in neutral and the engine revved even faster. The engine did not slow down until I turned off the ignition. After leaving the engine off for around two minutes, I restarted the engine and it resumed running at around 500 RPM. …”
NHTSA complaint #10514506, filed 2013-05, 27,000 miles“I noticed something hanging down from the bottom of the vehicle and on inspection determined it to be a fuel tank support strap. I took the vehicle to my mechanic for further inspection and when he put the vehicle on a lift one of the two support straps had corroded completely in two and the other strap was ly corroded nearly as bad. If the second strap had also broken and allowed the fuel tank to drop and drag on the pavement there could have been a severe fire. I had my mechanic replace both straps immediately today 11-2-16.”
NHTSA complaint #10923797, filed 2016-11, 80,500 miles“The contact owns a 2009 Mercury Grand Marquis. The contact stated that after refueling, gasoline fuel fumes emitted inside the vehicle and the fuel would dissipate to half of a tank within twenty minutes of driving. The dealer diagnosed that the fuel line, the fuel pump, and the fuel seal needed to be replaced. The vehicle was repaired. However, the failure recurred. The manufacturer was not notified of the failure. The approximate failure mileage was 35,000.”
NHTSA complaint #10651727, filed 2014-10, 35,000 milesFuel system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2011 | 1 | 11% |
| 2010 | 1 | 4% |
| 2009 | 3 | 12% |
| 2008 | 4 | 5% |
| 2007 | 5 | 5% |
| 2006 | 13 | 9% |
| 2005 | 2 | 0% |
| 2004 | 6 | 2% |
| 2003 | 10 | 3% |
| 2002 | 4 | 5% |
| 2001 | 5 | 3% |
| 2000 | 8 | 5% |
| 1999 | 6 | 4% |
| 1998 | 8 | 6% |
| 1997 | 32 | 10% |
| 1996 | 21 | 9% |
| 1995 | 8 | 4% |
| 1994 | 6 | 4% |
| 1993 | 6 | 4% |
| 1992 | 20 | 8% |
| 1991 | 4 | 5% |
| 1990 | 2 | 4% |
| 1989 | 5 | 9% |
| 1988 | 5 | 7% |
| 1987 | 2 | 5% |
| 1985 | 2 | 10% |
| 1984 | 2 | 13% |
| 1983 | 1 | 14% |
Other parts of the 2009 Mercury Grand Marquis
6 complaintsSteering
5 complaintsElectrical system
4 complaintsVehicle speed control
4 complaintsEngine
2 complaintsSuspension
2 complaintsTires
2 complaintsTransmission and drivetrain
2 complaintsAir bags
1 complaintsExterior lighting
1 complaintsSeat belts
1 complaintsBody and structure
1 complaints
← All problems reported for the 2009 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