1999 Mercury Cougar problems & reliability
454 owner complaints filed with NHTSA for the 1999 Mercury Cougar, alongside 5 safety recall campaigns. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
21 complaints report injuries (27 injured, 1 deaths reported).
Federal crash records (FARS 2020–2023): 1999 Mercury Cougar vehicles were involved in 4 fatal crashes with 4 occupant deaths. Involvement counts are not adjusted for how many are on the road and do not imply fault or a vehicle defect.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Electrical System | 99 | 22% |
| Service Brakes, Hydraulic | 72 | 16% |
| Engine and Engine Cooling | 67 | 15% |
| Visibility | 52 | 11% |
| Power Train | 50 | 11% |
| Fuel System, Gasoline | 39 | 9% |
| Exterior Lighting | 34 | 7% |
| Structure | 34 | 7% |
| Air Bags | 31 | 7% |
| Vehicle Speed Control | 31 | 7% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Mileage when problems occurred
Half of the failures with a reported odometer reading occurred by 68,717 miles (middle 50% between 46,700 and 97,750 miles), based on 126 complaints that included mileage.
Complaints by incident year
What owners report
“Yes, I purchased my vehicle in july of 2017. When I test drove the vehicle, everything seemed perfectly fine. Yet, the day I received it, I went to the gas station to fill up. Upon returning home, 1 mile., the engine light came on. I was told by the seller all was perfectly fine. Drive the car, it will be fine. I was…”
Fuel/propulsion System · filed Dec 12, 2017
“I got in my car one day after work in the parking lot and started my car and my airbag light was on. It stayed on for three days and is no longer on. It seems like no one wants to take account or provide solutions for the problem. Everytime I roll up my windows, my lights dim as if the battery is dying. My windshield…”
Exterior Lighting · filed Jan 25, 2017
“Transmission having problems going into gear constantly slipping and catching gears when trying to drive only gets up to 30 mph”
Power Train · filed Nov 24, 2016
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- BLOWER SWITCH/RESISTOR OR WIRING HARNESS
Engineering Analysis EA01001 · opened Jan 5, 2001 · closed Jul 31, 2001 · led to recall 01V230000
Technical service bulletins
229 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 1999 Mercury Cougar. The 10 most recent:
General (pcm) power train control module programming procedures. *tt
042107 · Service Bulletin/Repair Instructions · issued Dec 13, 2004
General power train control module (pcm) programming procedures. *tt
04217 · Service Bulletin/Repair Instructions · issued Nov 1, 2004
Malfunction indicator lamp (mil) illuminated with diagnostic trouble code(s) p0420 and/or p0430. *tt
041516 · Service Bulletin/Repair Instructions · issued Aug 9, 2004
Rear window defroster grid/integral antenna diagnosis and repair - terminal tab repair. *tt
041514 · Service Bulletin/Repair Instructions · issued Aug 9, 2004
Inoperative electric rear window defroster (heated backlite) grid lines, integral antenna concerns. *tt
031501 · Service Bulletin/Repair Instructions · issued Jul 12, 2004
Malfunction indicator lamp illuminated with diagnostic trouble code p0420 and/or p0430/ 2.5l engine only. *tt
04104 · Service Bulletin/Repair Instructions · issued May 21, 2004
Engine hesitation, loss of power, surging, and other similar symptoms as a result of contamination of the fuel pump. This program extends the coverage of the fuel delivery module (fdm). *tt *mj
04N02 · Service Bulletin/Repair Instructions · issued May 1, 2004
Steering column shipped without crush pad - reuse original crush pad if not damaged. *tt
041814 · Service Bulletin/Repair Instructions · issued Jan 1, 2004
Malfunction indicator lamp illuminated with diagnostic trouble codes (dtcs) p0442, p0455, p0456, p0457 or p1442 or a check fuel cap lamp illuminated with dtc p0457 for the evaporative emission system. *tt
03203 · Service Bulletin/Repair Instructions · issued Oct 13, 2003
Remote keyless entry (rke) - service tips. *tt
03181 · Service Bulletin/Repair Instructions · issued Sep 15, 2003
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
The 1999 Mercury Cougar has 5 NHTSA recall campaigns — recall repairs are free at franchised dealers regardless of the vehicle’s age.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 1999 Mercury Cougar?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Owners most often reported problems around 68,717 miles — budget accordingly if the car is approaching that mileage.