Problems owners report
Complaints filed with NHTSA about the 1984 Mercury Marquis, by the system named in each complaint. One complaint can name several.
- Electrical system5
- Power train3
- Fuel system, other2
- Structure2
- Service brakes, hydraulic1
- Engine and engine cooling1
- Equipment1
- Exterior lighting1
- Fuel system, gasoline1
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 1984 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
THE BOLTS THAT ATTACH THE D-SHAPED RING FOR THE SHOULDER BELT ARE INADEQUATELY SUPPORTED BY THE MATERIAL IN WHICH THEY ARE MOUNTED. THE ATTACHMENT DOES NOT COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 210, "SEAT BELT ASSEMBLY ANCHORAGES".
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 1984 Mercury Marquis: known faults, fixes and updates.
| Bulletin | Summary |
|---|---|
| 50940 | WINDSHIELD AND INTERIOR GLASS - FOG/FILM. *TW |
| 50905 | WIRING - ELECTRICAL DIODE IDENTIFICATION AND SERVICE REPLACEMENTS. *TW |
NHTSA manufacturer communications (public domain)
NHTSA investigations
PARKING BRAKE FAILURE
STALLING
SEATBACK FAILURE
NHTSA Office of Defects Investigation