Verdict · NHTSA data
Limited data — recalls on file
NHTSA has just 25 complaints on file for the 1984 Mercury Cougar — too few to judge reliability from owner reports alone — but one recall campaign applies to this year, so any used example should have its VIN checked for completed recall work.
25
NHTSA complaints
1
Recalls
2
Investigations
1
Crash-involved
3
Fires reported
0
Injuries
0
Deaths
—
NCAP overall
| Component | Complaints | Share | vs prior year |
|---|---|---|---|
| Electrical System | 9 | 36% | ▲ up |
| Brakes | 4 | 16% | new |
| Engine | 4 | 16% | ▲ up |
| Seat Belts | 2 | 8% | — flat |
| Steering | 2 | 8% | new |
| Visibility & Wipers | 1 | 4% | — flat |
| Fuel System | 1 | 4% | new |
| Other | 1 | 4% | new |
| Speed Control | 1 | 4% | new |
1 NHTSA recall campaign on file. Recall repairs are free at franchised dealers.
Defect
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".
Remedy
DEALERS WILL INSTALL NEW ATTACHING HARDWARE TO IMPROVE THE STRENGTH OF THE MOUNTING.
Representative excerpts, cleaned of personal information. These are consumer statements, not verified defects.
“THE VEHICLE CAUGHT FIRE FROM THE IGNITION SWITCH. SHE GOT INTO THE CAR AND STARTED THE IGNITON AND SMOKE CAME OUT/THEN IT WENT UP IN FLAMES. PLEASE DESCRIBE.*AK”
“VEHICLE STALLED AT ANY SPEED. HAS STALLED 4 TIMES SINCE PURCHASED 4 WEEKS AGO. INDEPENDENT MECHANIC SAID THAT TFI MODULE AND IGNITION SWITCH NEEDED TO BE REPLACED. ALSO THESE COMPONENTS CAUSED ELECTRICAL DAMAGE TO VEHICLE.*AK”
“WHEN APPLYING BRAKES IN EMERGENCY STOPPING SEAT BELTS DO NOT LOCK UP. ALSO, A BUMPING AND GRINDING NOISE OCCURS IN THE FRONT END OF THE VEHICLE AND THE ENGINE VIBRATES, CAUSE UNKNOWN. PLEASE GIVE ANY FURTHER DETAILS.*AK”
“WHEN APPLYING BRAKES IN EMERGENCY STOPPING SEAT BELTS DO NOT LOCK UP. ALSO, A BUMPING AND GRINDING NOISE OCCURS IN THE FRONT END OF THE VEHICLE AND THE ENGINE VIBRATES, CAUSE UNKNOWN. PLEASE GIVE ANY FURTHER DETAILS.*AK”
“WHILE DRIVING ON HIGHWAY WITH CRUISE CONTROL ON, ATTEMPTED TO SLOW DOWN BUT CRUISE CONTROL WOULD NOT DISENGAGE/ HAD TO TURN IGNITION SWITCH OFF TO STOP. *AK”
The record is thin — 25 NHTSA complaints — so owner-report data can't strongly confirm reliability either way, though 1 recall should be verified as completed.
According to NHTSA complaint data, the leading problem areas are electrical system (9 complaints), brakes (4 complaints), engine (4 complaints).
Yes — NHTSA lists 1 recall campaign affecting the 1984 Mercury Cougar. Recall repairs are free at franchised dealers; check the VIN at nhtsa.gov/recalls to confirm the work was done.
NHTSA opened 2 investigations into this model year; all are now closed.
Based on complaint rates and open investigations, the Cougar years to avoid are 1999, 2000, 1993, 1994, 1995, 2002, 1992, 1997, 1989, 1990, 2001, 1991, 1996, 1988, 1987. The cleanest record among Cougar years belongs to 1981.
Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.
Compiled by Sharon Ben-Moshe, Founder.