1998 Mercury Grand Marquis Engine Problems
- Complaints
- 3about this part
- Share
- 2%of 143 total for the year
- Median mileage
- 102,281miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the engine of the 1998 Mercury Grand Marquis, 2% of the 143 complaints for this model year. Where a mileage was given, the median is 102,281 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 observed a coolant leak around the thermostat. I found the plastic intake manifold to be cracked around the thermostat and leaking coolant. I made contact with Mercury and found that there had been a recall on the plastic intake manifold in which they would have replaced the part at no charge during the safety recall campaign. I was not made aware of the safety recall and have owned the vehicle since 04/17/02 when I purchased the vehicle used from a Mercury dealership. …”
NHTSA complaint #10574132, filed 2014-03, 102,281 miles“Vehicle started to buck and when I pulled my vehicle over I lifted the hood. I found anti-freeze flowing on the top of my engine. I had it towed to my local garage & they told me that the intake manifold is cracked. I did some research and found out there's a recall on this part. When I called my local ford dealer, they told me there is a recall on this part, but it's only for police and fleet vehicles only. Now that this was said to me, I was told by my garage it would cost me $1000 to fix. Something I don't have. Ford was not very cooperative about my situation and I'm very disappointed.”
NHTSA complaint #10513357, filed 2013-05, 127,300 miles“The contact owns a 1998 Mercury Grand Marquis. While driving various speeds, the engine misfired and hesitated to respond. The vehicle was taken to an independent mechanic who diagnosed that the plastic intake manifold was cracked, which caused anti freeze to leak out and damage the engine coils. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was 80,000.”
NHTSA complaint #10871517, filed 2016-05, 80,000 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 1998 Mercury Grand Marquis
26 complaintsSteering
17 complaintsExterior lighting
16 complaintsSuspension
16 complaintsElectrical system
15 complaintsBody and structure
10 complaintsVehicle speed control
9 complaintsFuel system
8 complaintsTransmission and drivetrain
8 complaintsBrakes
7 complaintsTires
7 complaintsAir bags
4 complaints
← All problems reported for the 1998 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