Problems · NHTSA complaints

1999 Mercury Cougar problems

Owners filed 454 complaints about the 1999 Mercury Cougar with NHTSA between Sep 1998 and Dec 2017. The most-cited component is electrical system (94).

Complaints
454
Filed with NHTSA
Crashes
23
Reported by owners
Fires
3
Reported by owners
Injuries
27
People reported injured
Deaths
1
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Electrical system94
  2. Service brakes, hydraulic63
  3. Engine and engine cooling62
  4. Power train49
  5. Visibility48
  6. Fuel system, gasoline39
  7. Exterior lighting33
  8. Air bags29
  9. Vehicle speed control29
  10. Structure29
  11. Tires26
  12. Suspension21
  13. Steering20
  14. Latches/locks/linkages15

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Nov 9, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
19985
199947
200081
200171
200259
200350
200434
200523
200629
200715
20088
20096
20102
20110
20125
20135
20144
20154
20164
20172

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Electrical system

94 reports1 crash2 fires2 related recalls
“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 WIPER CONTROL DOESN'T SHUT OFF AND IM NOT ABLE TO CHANGE THE SPEED.”
Owner complaint to NHTSAFiled Jan 25, 2017Electrical system, Exterior lighting, Air bagsODI 10947691

Service brakes, hydraulic

63 reports5 crashes2 related recalls
“BOUGHT CAR AT DEALER ON 02/05/01 SINCE THEN I'VE HAD TO REPAIR CAR ON TOO MANY OCCASIONS. HERE SOME OF THE REPAIRS I'VE HAD TO DO ON THIS CAR EVER SINCE I BOUGHT IT. ON 3/01: BRAKES, 10/01: DEALERSHIP REPLACED BATTERY AND PERFORMED A RECALL,12/01: DEALERSHIP REPLACED ALTERNATOR, 05/02: BRAKE PADS, 04/04: WATER PUMP BELT, 09/04: REPLACED BATTER, 10/11/04: REPLACED ALTERNATOR AND BELT, 10/14/04: REPLACED POSITIVE BATTERY TERMINAL, 12/04: REPLACED RADIO, 02/06: REPLACED MOTOR MOUNT, 01/07:REPLACED BATTERY, 02/07: REPLACED STRUT, 02/08: REPLACED SHOCK ABSORBER, 10/08: REPLACED BATTERY, 04/09: REPLACED BEARING, TRANSMISSION & ANCHOR ENGINE MOUNT AND DON'T HAVE THE DATE BUT ALSO HAD TO REPLACE THE WINDSHIELD WIPER MOTOR. THESE REPAIRS ARE WHAT I HAVE IN RECEIPTS YET FOR EXAMPLE I HAVE REPLACED THE MOTOR MOUNTS MORE THAN ONCE. CURRENTLY THE FOLLOWING AREAS OF MY VEHICLE DO NOT FUNCTION: THE HORN NO LONGER WORKS, CRUISE CONTROL IS NOT FUNCTIONING, THE AIR CONDITIONER NO LONGER HEATS, & THE BRAKE LIGHT OF MY VEHICLE REMAINED LIT WHEN THE VEHICLE WAS ON AND NOW HAVE FAILED TO TURN OUT (LAMP SOCKET IS BURNT). *TR”
Owner complaint to NHTSAFiled Dec 7, 2009Suspension, Service brakes, hydraulic, Engine and engine cooling, Power train, Electrical system, Exterior lighting, Electronic stability control (esc)ODI 10294762

Engine and engine cooling

62 reports5 crashes
“TL* THE CONTACT OWNS A 1999 MERCURY COUGAR. THE CONTACT STATED THAT THE CHECK ENGINE LIGHT ILLUMINATED UPON STARTING THE VEHICLE. IN ADDITION, THE ENGINE EXHIBITED A LOSS OF POWER. THE VEHICLE WAS TAKEN TO AN INDEPENDENT REPAIR SHOP AND THE CONTACT WAS INFORMED THAT THE CATALYTIC CONVERTER NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE FAILURE RECURRED APPROXIMATELY ELEVEN MONTHS LATER. THE VEHICLE WAS TAKEN BACK TO THE REPAIR SHOP AND THE CONTACT WAS INFORMED THAT THE SAME REPAIRS WOULD BE NEEDED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND THE CONTACT WAS INFORMED THAT THE VEHICLE WAS NOT INCLUDED IN THE RECALL ASSOCIATED WITH NHTSA CAMPAIGN ID NUMBER 04V42100(FUEL SYSTEM, GASOLINE). THE FAILURE MILEAGE WAS 125,000. UPDATED 03/14/12 *BF”
Owner complaint to NHTSAFiled Jan 3, 2012Engine and engine cooling, Fuel system, gasolineODI 10442276

Power train

49 reports1 crash
“WHEN DRIVEN IT JERKS WHEN U TAKE OFF AND WHEN IT SHIFTS, AND IT MAKES A CLUNK NOISE WHEN I HIM HIT A BUMP IT IS SO BAD MY CAR GOES THE OTHER WAY THE REAR END. *TR”
Owner complaint to NHTSAFiled Jun 5, 2012Suspension, Power train, EngineODI 10460730

Visibility

48 reports
“TL* THE CONTACT OWNS A 1999 MERCURY COUGAR. THE CONTACT STATED THAT THE SUNROOF SEPARATED FROM THE VEHICLE, WHICH COULD CAUSE POSSIBLE WATER DAMAGE. THE DEALER AND MANUFACTURER WERE NOTIFIED, BUT DENIED ANY ASSISTANCE WITH REPAIRS OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 135,000 AND THE CURRENT MILEAGE WAS 139,000. THE VIN WAS UNAVAILABLE.”
Owner complaint to NHTSAFiled Mar 15, 2012VisibilityODI 10451745

Fuel system, gasoline

39 reports1 related recall
“TL* THE CONTACT OWNS A 1999 MERCURY COUGAR. THE CONTACT STATED THAT WHILE DRIVING 70 MPH, THE VEHICLE BECAME HESITANT TO ACCELERATION ATTEMPTS BEFORE STALLING. THE CHECK ENGINE LIGHT ILLUMINATED AFTER THE FAILURE OCCURRED. THE CONTACT WAS ABLE TO RESTART THE VEHICLE AS IT RETURNED TO NORMAL FUNCTION. THE VEHICLE WAS TAKEN TO A LOCAL MECHANIC WHO PERFORMED A DIAGNOSTIC AND LOCATED THE FAILURE AT THE FUEL PUMP. THE MECHANIC ADVISED THAT THE FUEL PUMP WAS NOT RECEIVING THE CORRECT FUEL LEVEL. THE FAILURE MILEAGE WAS 88,700 AND THE CURRENT MILEAGE WAS 88,800.”
Owner complaint to NHTSAFiled Apr 18, 2012Fuel system, gasolineODI 10455681
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 9, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.