2004 Mercury Grand Marquis Engine cooling Problems
- Complaints
- 10about this part
- Share
- 3%of 348 total for the year
- Median mileage
- 100,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 10 complaints about the engine cooling of the 2004 Mercury Grand Marquis, 3% of the 348 complaints for this model year. Where a mileage was given, the median is 100,000 miles. 1 a fire, according to the filers.
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 had what seems to be a simple coolant leak but it turned out to be the plastic intake manifold cracked. Putting a plastic part on top of a motor seems to me a failure of engineering on the part of ford. I did not receive any call back for this part. I did some searching on the web and found that many ford owners had the same problem. I plan to call ford company on monday. Do you have any info for me on this subject. Thank you.”
NHTSA complaint #10434319, filed 2011-11, 98,116 miles“2004 Mercury marquis 4.6 l engine. Spark plug blew out while driving, creating significant safety hazard because of loss of power and presence of combustible gasoline fumes. This is a safety hazard!”
NHTSA complaint #10334762, filed 2010-06, 108,090 miles“Intake manifold cracked, needed replacement. This is a plastic component which is not designed for cold weather climates. This is the second time (second car) that this has happened to.”
NHTSA complaint #10252549, filed 2008-12, 100,000 miles“When driving at low speeds, the vehicle would surge forward without warning. The consumer will take the vehicle to the dealership for inspection. Please provide any further details.”
NHTSA complaint #10082165, filed 2004-09, 3,300 miles“The contact owns a 2004 Mercury Grand Marquis. The contact stated that she noticed a leak underneath her vehicle with the check engine and coolant warning lights illuminated. The contact had taken the vehicle to an independent mechanic where it was discovered that coolant had been leaking from a crack in the intake manifold. The dealer nor the manufacturer had been notified of the failure. The vehicle had yet to be repaired. The failure mileage was approximately 150,000.”
NHTSA complaint #11441976, filed 2021-11, 150,000 milesRelated service bulletins
- 10109070Sep 21, 2016The Powertrain Control/Emissions Diagnosis (PC/ED) manual has been revised for diagnosing electronic throttle bodies (ETBs). The ETC_ACT and ETC_DSD PIDs should not used to…
- 10023943Oct 1, 2007Some 1997-2008 vehicles equipped with a 4.6l 2v, 5.4l 2v, or 6.8l 2v engine--spark plug thread repair procedure--not covered under new vehicle limited warranty. *nj this includes…
- 10018745Nov 14, 2005Wds cop kit diagnostic tip - coil on plug (cop) ignition systems - engine misfire or rough running.
- 10012947Feb 21, 2005Maf diagnostic service tip - vehicles equipped with egr system module (esm).
- 10012940Feb 7, 2005Idle vibration vehicles equipped with single exhaust.
- 10011162Aug 23, 2004Engine misfire or running - coil on plug (cop) ignition systems - wds cop kit diagnostic tips. To include various 2005 models. * ar this article 04161 supersedes tsb 03-14-04.
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2010 | 1 | 4% |
| 2008 | 5 | 6% |
| 2007 | 3 | 3% |
| 2006 | 2 | 1% |
| 2005 | 9 | 2% |
| 2004 | 10 | 3% |
| 2003 | 13 | 4% |
| 2002 | 10 | 13% |
| 2001 | 20 | 13% |
| 2000 | 17 | 10% |
| 1999 | 26 | 16% |
| 1998 | 26 | 18% |
| 1997 | 124 | 39% |
| 1996 | 85 | 36% |
| 1995 | 8 | 4% |
| 1994 | 15 | 10% |
| 1993 | 7 | 5% |
| 1992 | 19 | 7% |
| 1991 | 10 | 12% |
| 1990 | 3 | 5% |
| 1989 | 6 | 10% |
| 1988 | 7 | 10% |
| 1987 | 5 | 12% |
| 1986 | 4 | 19% |
| 1985 | 3 | 14% |
| 1984 | 5 | 33% |
Other parts of the 2004 Mercury Grand Marquis
207 complaintsSteering
65 complaintsElectrical system
40 complaintsVehicle speed control
23 complaintsVisibility (wipers, defrost, mirrors)
11 complaintsTransmission and drivetrain
9 complaintsBody and structure
8 complaintsBrakes
7 complaintsAir bags
6 complaintsFuel system
6 complaintsInterior lighting
6 complaintsTires
5 complaints
← All problems reported for the 2004 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