1999 Mercury Marquis Engine cooling Problems
- Complaints
- 3about this part
- Share
- 13%of 24 total for the year
- Median mileage
- 95,052miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the engine cooling of the 1999 Mercury Marquis, 13% of the 24 complaints for this model year. Where a mileage was given, the median is 95,052 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 contact stated the fitting that connects the heater line to the intake manifold fractured and detached. As a result of the failure, the vehicle over heated. The contact saw steam coming from underneath the hood and pulled the vehicle over for inspection. The vehicle was towed to an independent repair shop for repairs. The manufacturer was contacted and determined the time had expired for the 7 year replacement for a free remedy.”
NHTSA complaint #10148829, filed 2006-01, 111,000 miles“While driving in traffic, consumer states that vehicles engine seized. Consumer was almost rear ended. Took to dealer and the dealer said the idler cooling valves failed. Please provide any further information. Ts”
NHTSA complaint #10001676, filed 2002-12Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2003 | 2 | 6% |
| 2002 | 2 | 18% |
| 2001 | 3 | 12% |
| 2000 | 3 | 13% |
| 1999 | 3 | 13% |
| 1998 | 4 | 14% |
| 1997 | 21 | 40% |
| 1996 | 11 | 35% |
| 1995 | 1 | 5% |
| 1994 | 4 | 13% |
| 1992 | 4 | 17% |
| 1990 | 1 | 17% |
| 1988 | 1 | 11% |
| 1985 | 1 | 20% |
| 1984 | 1 | 10% |
Other parts of the 1999 Mercury Marquis
4 complaintsVehicle speed control
4 complaintsElectrical system
3 complaintsSteering
3 complaintsVisibility (wipers, defrost, mirrors)
3 complaintsEquipment
2 complaintsBody and structure
2 complaintsAir bags
1 complaintsElectronic stability control
1 complaintsExterior lighting
1 complaintsFuel system
1 complaintsLatches, locks and linkages
1 complaints
← All problems reported for the 1999 Mercury Marquis
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 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