Problems owners report
Complaints filed with NHTSA about the 1986 Mercury Cougar, by the system named in each complaint. One complaint can name several.
- Electrical system4
- Seat belts3
- Vehicle speed control2
- Visibility1
- Service brakes, hydraulic1
- Seats1
- Engine and engine cooling1
- Fuel system, gasoline1
- Structure1
NHTSA ODI complaints (public domain) · updated 23 Oct 2026 · 1 injuries and 0 deaths reported
Compared with other years
NHTSA ODI complaints by model year
New York safety inspections
At its first New York inspection the 1986 Mercury Cougar failed the safety check 0.00% of the time — 100% less often than the average 1986 passenger car (0.76%). Median odometer at inspection: 80,189 miles.
NY DMV Vehicle Inspections (vezn-fmmk), initial inspections since Aug 2021 · how we count
In New Zealand
1 1986 cars are on the New Zealand register.
NZ Transport Agency Waka Kotahi, Motor Vehicle Register (March 2026) · CC BY 4.0
Recalls in Canada
2 Transport Canada recalls for the 1986 Mercury Cougar.
| 1992098 21 Aug 1992 | Emissions NOTE: VEHICLES WITH 3.8 LITRE ENGINES. THESE VEHICLES MAY NOT COMPLY WITH C.M.V.S.S. 1103 - EXHAUST EMISSIONS. THE SUBSTRATE MATERIAL IN THE CATALYSTS MAY RAT… |
| 1987098 9 Sept 1987 | Fuel System ON VEHICLES WITH EFI OR CFI, THE SPRING-LOCK FUEL LINE COUPLING USED TO CONNECT THE FUEL SUPPLY AND RETURN LINES TO THE EFI FUEL RAILS OR TO THE CFI THROTTLE BO… |
Transport Canada Vehicle Recalls Database · Contains information licensed under the Open Government Licence – Canada
Recalls
SPRING LOCK FUEL LINE COUPLING MAY NOT BE PROPERLY ENGAGED.
HEADLAMP COVERS WERE INSTALLED ON VEHICLES IN ERROR. CAUSING THE CARS NOT TO COMPLY WITH FMVSS 108, LAMPS, REFLECTIVE DEVICES AND ASSOCIATED EQUIPMENT. CONSEQUENCE OF DEFECT: THE HEADLAMP COVERS MAY HINDER THE SAFE OPERATION OF THE CAR IN DARKNESS AND OTHER CONDITIONS OF REDUCED VISIBILITY.
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 1986 Mercury Cougar: known faults, fixes and updates.
| Bulletin | Summary |
|---|---|
| 623988 | INFORMATION REGARDING TRANSMISSION FLUID USAGE CHARTS. *SLC |
| 623944 | SOME VEHICLES MAY EXHIBIT HEATER CORE LEAKS. *SLC |
| 612203 | INFORMATION REGARDING THE NEW TRANSMISSION COOLER FLUSHER- SERVICE TIP. *MJS |
| 6090087 | INFORMATION ON IDENTIFYING NON-APPROVED / ALTERNATE REFRIGERANTS WHICH COULD CAUSE SAFETY, AND PERFORMANCE CONCERNS IF INSTALLED IN FORD A/C SYSTEMS. *TT |
| 6089681 | SUBJECT ON A WIRE HARNESS TERMINAL REPAIR KIT AVAILABLE FOR REPAIRING ELECTRICAL WIRING HARNESSES. *TT |
| 608431 | INFORMATION ON THE NEW FLUSH AND FILL TOOL AVAILABLE THROUGH ROTUNDA. *TT |
| 601343 | A NEW SILICONE GASKET AND SEALANT. *YC |
| 601290 | INFORMATION ON TIRE COMPANY TELEPHONE NUMBERS FOR CUSTOMER ASSISTANCE. *YC |
| 601269 | ANNOUNCING THE FORD OEM AIR CONDITIONING RETROFIT KIT AVAILABILITY. *YC |
| 601238 | INFORMATION ON A NEW TRANSMISSION FLUID USAGE CHART. *YC |
| 601012 | THE USE OF PETROLEUM-BASED GREASE AS A LUBRICANT IN SERVICING DISC BRAKES IS NO LONGER ACCEPTABLE. *YC |
| 51945 | FLUID- TRANSMISSION FLUID USAGE CHARTS. *JD |
| 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 |
| 50908 | TORQUE CONVERTER - LEAK TEST PROCEDURE - SERVICE TIP. *TW |
| 50905 | WIRING - ELECTRICAL DIODE IDENTIFICATION AND SERVICE REPLACEMENTS. *TW |
| 46478 | THE USE OF PETROLEUM-BASED GREASE AS A LUBRICANT IN SERVICING DISC BRAKES IS NO LONGER ACCEPTABLE BECAUSE IT MAY BE INCOMPATIBLE WITH THE RUBBER MATERIAL USED IN THE DISC BRAKE SYSTEM. IF PETROLEUM-BASED GREASE IS USED TO LUBRICATE ANY PART OF THE DISC BRAKE SYSTEM, IT COULD CAUSE RUBBER PARTS TO SWELL IF LUBRICANT CONTACTS THE RUBBER MATERIAL. |
| 39900 | ROUGHNESS CONCERN DURING BRAKE APPLICATION. *TW |
| 3030300 | UNKNOWN |
NHTSA manufacturer communications (public domain)
NHTSA investigations
SEATBACK FAILURE
NHTSA Office of Defects Investigation