Problems · by component
1999 Mercury Cougar engine and engine cooling problems
62 owner complaints to NHTSA about the 1999 Mercury Cougar cite engine and engine cooling, 14% of all 454 complaints for this model year.
Complaints
62
14% of all complaints
Crashes
5
Reported by owners
Fires
0
Reported by owners
Injuries
6
Reported by owners
What owners say about the engine and engine cooling
Verbatim from NHTSA complaints, newest first
“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”
“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”
“TL*THE CONTACT OWNS A 1999 MERCURY COUGAR. THE CONTACT STATED THAT THE ENGINE REVS VERY HIGH AND THEN THE VEHICLE BEGINS TO JERK. THE CONTACT HAS TAKEN THE VEHICLE TO THE DEALER ON SEVERAL OCCASIONS, BUT THEY HAVE BEEN UNABLE TO DIAGNOSE THE CAUSE OF FAILURE. THE CONTACT INFORMED THE MANUFACTURER ABOUT THE FAILURE AND MENTIONED THAT THE DEALER CHANGED SEVERAL PARTS. THE MANUFACTURER STATED THAT THERE WERE NO CURRENT RECALLS OR SERVICE BULLETINS FOR THIS FAILURE. THE SERPENTINE BELT, THROTTLE ASSEMBLY, AND VACUUM TUBE WERE REPLACED, BUT THE FAILURE PERSISTS. THE CURRENT AND FAILURE MILEAGES WERE 183,000. THE CONSUMER STATED BELIEVES DEALER CHARGED FOR UNNECESSARY REPAIRS, INACCURATE DIAGNOSTICS, AND FINANCIAL BURDEN FOR CAR RENTALS AND WANTS TO BE REIMBURSED ALL THE OUTPOCKET EXPENSES. UPDATED 09/05/07 *TR”
“TL*THE CONTACT OWNS A 1999 MERCURY COUGAR. THE MECHANIC NOTICED OIL LEAKING FROM THE OIL PAN GASKET ONTO THE EXHAUST PIPES. THE MECHANIC STATED THAT THE OIL PAN GASKET MATERIAL WAS DEFECTIVE. THE CONTACT CURRENTLY HAS TO CARRY A FIRE EXTINGUISHER. THE MECHANIC STATED DUE TO THE FAILURE A FIRE COULD OCCUR AT ANY TIME. THE MANUFACTURER STATED THAT NO RECALLS WERE ISSUED AND WOULD NOT REPAIR OR REPLACE THE GASKET. THE CURRENT MILEAGE IS 45,000 AND FAILURE MILEAGE WAS 33,000. THE CONSUMER STATED THE GASKET MATERIALS USED WERE NOT DURABLE AND SOFT ENOUGH. THEY MUST HAVE EXPERIENCED CRACKING DUE TO TEMPERATURE FATIGUE. UPDATED 10/11/07. *JB”
“RECALL OF BRAKE PRESSURE CONTROL. FORD SERVICE CENTER STATES REPAIR WAS DONE ON 12-19-2000, BUT THERE IS NO RECORDS TO CONFIRM. IN ADDITION, THE FUEL SYSTEM RECALL, FORD STATES THAT THERE ISN'T ONE ON MY VEHICLE, HOWEVER, MY VECHICLE DISPLAYS THE SAME SYMPTOMS DESCRIBED UNDER RECALL 04V421000 AND THE CONTINUOUS CHECK ENGINE LIGHT. I HAVE HAD ALL SENSORS REPAIRED THAT CAME UP IN ENGINE DIAGNOSTIC TESTING . ACCORDING TO LAST TEST DONE, READS FUEL IS RUNNING LEAN BUT CAN'T REPAIR BECAUSE NO CODE APPEARS FOR THAT TO SHOW WHERE PROBLEM LIES. I HAVE HAD FUEL SYSTEM FLUSHED TO HELP REMEDY PROBLEM. STILL HAVING ISSUES. *TR”
“MY 1999 COUGAR WAS TAKEN IN FOR A TUNE UP RECENTLY. THE SPARK PLUGS WERE REPLACED WITH NEW ONES. APPROXIMATELY 3 WEEKS LATER ONE OF THEM BLEW BECAUSE FORD MADE A DEFECTIVE SPARK PLUG THREAD. NOW I CANNOT GET IT FIXED BECAUSE A FORD SPECIALIST MUST GO THROUGH THE ENGINE TO REPAIR AND IT WILL COST $1300.00. I THOUGHT GETTING A TUNE UP WAS A GOOD THING! *JB”
Showing 6 of 62 reports. Read every report on NHTSA.gov.
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 9, 2026NHTSA vehicle page
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.