2008 Mercury Grand Marquis Fuel system Problems
- Complaints
- 4about this part
- Share
- 5%of 80 total for the year
- Median mileage
- 69,412miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the fuel system of the 2008 Mercury Grand Marquis, 5% of the 80 complaints for this model year. Where a mileage was given, the median is 69,412 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.
“The vehicle recently experienced two sudden acceleration events in two days 15 miles apart while decelerating and using the brake in what could only be related to an intermittent failure of the electronic throttle control. While on vacation during a 75 deg evening with the car at operating temperature I was navigating some s turns high on a bluff at 30mph. While coming into a corner with my foot on the brake and slowing to around 20mph the car suddenly accelerated. I hit the brakes hard, turned away from the corner to avoid going over the cliff and turned off the key. …”
NHTSA complaint #10861624, filed 2016-04, 75,000 miles“I was driving on the interstate going about 65 MPH. I accelerated rapidly to pass a semi when I was getting close to my exit. After passing the semi I let my foot off of the accelerator but the vehicle did not slow down. I applied the brake pedal but the vehicle kept accelerating for about 5 seconds. After that I heard an audible clunk come from the engine compartment and the vehicle returned to normal operation. This is the second time this has happened the first was a month ago accelerating rapidly from a stand still position. In neither case did I wreck or get a speeding ticket.”
NHTSA complaint #10513530, filed 2013-05, 86,000 miles“When the gas gauge registers below 1/2 tank, and the tank is refueled to capacity, it takes several miles driving( approx. 30-50 miles) for the gauge to register full. Also, if the tank is towards the empty mark, and the car is filled to capacity, and the car is driven, the low fuel light will come on, and stay on for an extended period of time. At times, before the car is driven, the car refuses to start as if it is not getting any gas. After it sets for a while, it will start.”
NHTSA complaint #10437633, filed 2011-11, 25,000 miles“The contact owns a 2008 Mercury Grand Marquis. The contact stated that while reversing the vehicle, he heard an abnormal noise coming from underneath the vehicle. The contact exited the vehicle to inspect the vehicle. The contact stated that the fuel tank detached and was hanging down underneath the vehicle. The vehicle was not taken to be diagnosed nor repaired. The manufacturer was notified of the failure however, there was no assistance provided. The failure mileage was 63,824.”
NHTSA complaint #11326128, filed 2020-05, 63,824 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 2008 Mercury Grand Marquis
23 complaintsVehicle speed control
15 complaintsBrakes
10 complaintsElectrical system
9 complaintsBody and structure
9 complaintsEngine cooling
5 complaintsExterior lighting
5 complaintsEngine
4 complaintsAir bags
3 complaintsEquipment
3 complaintsOther or unknown
3 complaintsSeat belts
3 complaints
← All problems reported for the 2008 Mercury Grand 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