2000 Mercury Grand Marquis Engine Problems
- Complaints
- 8about this part
- Share
- 5%of 162 total for the year
- Median mileage
- 71,290miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 8 complaints about the engine of the 2000 Mercury Grand Marquis, 5% of the 162 complaints for this model year. Where a mileage was given, the median is 71,290 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.
“A spark was blown out of the cylinder head. The problem occurred 3 times (2010, 2014, 2014), each time a different cylinder. One of these times, it occurred to my wife 140 km away from home. I had to guess that it was a blown spark plug and instructed her to drive the car to toronto in this condition. Concern: aside from the costly repair, I am afraid to use the car on a long trip for fear that this will happen at a place where a repair is not available. …”
NHTSA complaint #10701193, filed 2015-03, 105,000 miles“I believe this issue effects millions of ford and Mercury vehicles, many of which are taxi, government, and police cars. Apparently, the computer (PCM) that controls the engine can shut the engine down while the vehicle is driving when certain sensors fail (at least 2 known sensors per my research). I found this out at 65 MPH, 2 hours from home. I was told by the dealer that there are no new pcms made for my 2000 car, and that I had to rely on a rebuilt after market PCM. The aftermarket seller related that these computers last approximately 10 years. …”
NHTSA complaint #11089850, filed 2018-04, 43,000 miles“The contact owns a 2000 Mercury Grand Marquis. While driving various speeds, the vehicle hesitated to accelerate. The failure occurred most frequently when traveling up hill. The failure was intermittent and the check engine warning indicator illuminated. The dealer was not notified. The vehicle was not diagnosed or repaired. The contact sprayed carburetor fluid on the intake manifold and noticed a crack. The manufacturer was made aware of the failure. The failure mileage was 118,000.”
NHTSA complaint #11210300, filed 2019-05, 118,000 miles“The contact owns a 2000 Mercury Grand Marquis. The contact stated that the thermostat was leaking. The thermostat was replaced however, the intake manifold failed and fell into the thermostat after the replacement. Additionally, there was a leak in the sensor coolant temperature sensor area which was repaired with a sealing solution and the thermostat was replaced because the plastic inside the intake manifold was deteriorated. The defect was not repaired or diagnosed. The current mileage was 170,000. The approximate failure mileage was 50,000.”
NHTSA complaint #10573805, filed 2014-03, 50,000 milesEngine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2010 | 1 | 4% |
| 2009 | 2 | 8% |
| 2008 | 4 | 5% |
| 2007 | 4 | 4% |
| 2006 | 8 | 6% |
| 2005 | 5 | 1% |
| 2004 | 4 | 1% |
| 2003 | 5 | 1% |
| 2002 | 2 | 3% |
| 2001 | 9 | 6% |
| 2000 | 8 | 5% |
| 1999 | 7 | 4% |
| 1998 | 3 | 2% |
| 1997 | 2 | 1% |
| 1996 | 1 | 0% |
| 1994 | 1 | 1% |
| 1990 | 1 | 2% |
| 1985 | 1 | 5% |
Other parts of the 2000 Mercury Grand Marquis
21 complaintsBrakes
18 complaintsSteering
18 complaintsElectrical system
17 complaintsEngine cooling
17 complaintsVisibility (wipers, defrost, mirrors)
16 complaintsSuspension
15 complaintsVehicle speed control
13 complaintsSeat belts
9 complaintsFuel system
8 complaintsTires
7 complaintsAir bags
6 complaints
← All problems reported for the 2000 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