1999 Mercury Grand Marquis Engine cooling Problems
- Complaints
- 26about this part
- Share
- 16%of 164 total for the year
- Median mileage
- 90,200miles
- Trend
- FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.
NHTSA recorded 26 complaints about the engine cooling of the 1999 Mercury Grand Marquis, 16% of the 164 complaints for this model year. Where a mileage was given, the median is 90,200 miles. 1 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Cracked the air intake on my 1999 Mercury Grand Marquis. It was made out of cheap plastic. I had to step on the throttle to get out of the way, and my car started steaming. Come to find out, the intake manifold cracked. It's only $300 for the part, not including labor.”
NHTSA complaint #10377186, filed 2011-01, 120,000 miles“My car was in drive at a business traffic intersection drive way on a slight hill with the brakes on when the engine surged and the car started to reverse while still in drive. I had to put considerable pressure on the brakes to stop it. I checked and the shift lever was still in drive. My car has been properly maintained and was recently serviced with all required services done. This really scared me and I would have crashed into a car if it was behind me. Ford should look into this safety problem.”
NHTSA complaint #10663813, filed 2014-12, 108,000 miles“I received noticed of intake manifold on fords passengers cars failure and of the settlement offered to repair and warrant said intake manifold. At that time I owned a 1999 Grand Marquis ls. …”
NHTSA complaint #10380003, filed 2011-02, 65,000 miles“I noticed coolant leaking from somewhere in the engine compartment, but initially had trouble finding where the leak was coming from. I finally discovered that the intake manifold was cracked at the plastic thermostat housing.”
NHTSA complaint #10209851, filed 2007-11, 150,000 miles“While driving, (at any speed)the car's engine shut down several times. Each time I heard a beep and warning lights came on- check engine, traction control and ABS. After a minute or so, the engine would start normally. The engine shut down 6 times ! Each time I heard the beep and warning lights illuminated including traction control and check engine lights. I was on my way home with my newborn in the car,it just cuts off, and it nearly caused an accident on the highway as many other cars almost ran into me because the car shut off while I was driving on the highway. …”
NHTSA complaint #10386939, filed 2011-03, 183,172 milesRelated service bulletins
- 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…
- 10018959Dec 14, 2005Extended coverage program 05n04 - extended coverage for composite intake manifold. This program is being provided as a settlement to a class action lawsuit. The terms of the…
- 10018745Nov 14, 2005Wds cop kit diagnostic tip - coil on plug (cop) ignition systems - engine misfire or rough running.
- 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 1999 Mercury Grand Marquis
20 complaintsSuspension
18 complaintsSteering
16 complaintsElectrical system
15 complaintsTires
12 complaintsTransmission and drivetrain
12 complaintsVehicle speed control
12 complaintsBrakes
9 complaintsEngine
7 complaintsSeat belts
7 complaintsBody and structure
7 complaintsFuel system
6 complaints
← All problems reported for the 1999 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