Problems owners report
Complaints filed with NHTSA about the 1985 Mercury Marquis, by the system named in each complaint. One complaint can name several.
- Tires1
- Engine and engine cooling1
- Vehicle speed control1
- Power train1
- Electrical system1
NHTSA ODI complaints (public domain) · updated 23 Oct 2026 · 0 injuries and 0 deaths reported
Compared with other years
NHTSA ODI complaints by model year
In New Zealand
1 1985 cars are on the New Zealand register; 100% arrived as used imports, 0% were sold new in New Zealand.
NZ Transport Agency Waka Kotahi, Motor Vehicle Register (March 2026) · CC BY 4.0
Recalls in Canada
1 Transport Canada recall for the 1985 Mercury Marquis.
| 1985070 31 May 1985 | Not Entered THE TANDEM POWER BRAKE BOOSTER REAR SHELLS MAY HAVE BEEN PRODUCED WITH REDUCED WALL THICKNESSES. REPEATED BRAKE APPLICATIONS COULD CAU SE SUCH A SHELL TO CRACK … |
Transport Canada Vehicle Recalls Database · Contains information licensed under the Open Government Licence – Canada
Recalls
BRAKE BOOSTER REAR SHELLS MAY HAVE REDUCED WALL THICKNESSES WHICH COULD CAUSE THE SHELL TO BREAK. CONSEQUENCE OF DEFECT: REPEATED BRAKE USE COULD CAUSE THE SHELL TO CRACK AND THE BOOSTER ASSEMBLY TO COME APART. SERVICE BRAKES CAPABILITY WOULD BE TOTALLY LOST WITHOUT WARNING AND COULD RESULT IN AN ACCIDENT.
Whether a recall was fixed on a particular car is known only to the manufacturer: check the VIN at nhtsa.gov/recalls.
NHTSA recalls · summaries in NHTSA's own words
Service bulletins
What Mercury told its dealers about the 1985 Mercury Marquis: known faults, fixes and updates.
| Bulletin | Summary |
|---|---|
| 6090087 | INFORMATION ON IDENTIFYING NON-APPROVED / ALTERNATE REFRIGERANTS WHICH COULD CAUSE SAFETY, AND PERFORMANCE CONCERNS IF INSTALLED IN FORD A/C SYSTEMS. *TT |
| 50997 | TRANSAXLE - TORQUE CONVERTER REPLACEMENT GUIDELINES AND TORQUE CONVERTER/TRANSAXLE COOLING SYSTEM CLEANING PROCEDURES - SERVICE TIP. *TW |
| 50940 | WINDSHIELD AND INTERIOR GLASS - FOG/FILM. *TW |
| 50905 | WIRING - ELECTRICAL DIODE IDENTIFICATION AND SERVICE REPLACEMENTS. *TW |
NHTSA manufacturer communications (public domain)
NHTSA investigations
STALLING
SEATBACK FAILURE
NHTSA Office of Defects Investigation