Problems · by component
1999 Mercury Grand Marquis engine and engine cooling problems
29 owner complaints to NHTSA about the 1999 Mercury Grand Marquis cite engine and engine cooling, 15% of all 197 complaints for this model year.
Complaints
29
15% of all complaints
Crashes
0
Reported by owners
Fires
1
Reported by owners
Injuries
1
Reported by owners
What owners say about the engine and engine cooling
Verbatim from NHTSA complaints, newest first
“The contact owns a 1999 Mercury Grand Marquis. The contact stated that the vehicle had a leaking intake manifold. The vehicle was taken to an independent mechanic and diagnosed that the intake manifold needed to be replaced. The vehicle was not repaired. The dealer and manufacturer were made aware of the failure but informed the contact that there was no recall associated with the VIN. The failure mileage was approximately 120,000.”
“MY CAR WAS IN DRIVE AT A BUSINESS TRAFFIC INTERSECTION DRIVE WAY ON A SLIGHT HILL WITH THE BRAKES ON WHEN THE ENGINE SURGED AND THE CAR STARTED TO REVERSE WHILE STILL IN DRIVE. I HAD TO PUT CONSIDERABLE PRESSURE ON THE BRAKES TO STOP IT. I CHECKED AND THE SHIFT LEVER WAS STILL IN DRIVE. MY CAR HAS BEEN PROPERLY MAINTAINED AND WAS RECENTLY SERVICED WITH ALL REQUIRED SERVICES DONE. THIS REALLY SCARED ME AND I WOULD HAVE CRASHED INTO A CAR IF IT WAS BEHIND ME. FORD SHOULD LOOK INTO THIS SAFETY PROBLEM. *TR”
“TL* THE CONTACT OWNS A 1999 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT THE VEHICLE WOULD STALL SPORADICALLY AND WITHOUT WARNING. A LOCAL MECHANIC DIAGNOSED THAT THE INTAKE MANIFOLD WOULD NEED TO BE REPLACED. THE DEALER WAS CONTACTED, BUT DENIED ANY ASSISTANCE WITH REPAIRS TO THE DEFECT. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE AND THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 90,200 AND THE CURRENT MILEAGE WAS 91,000.”
“VEHICLE WOULD SHAKE VIOLENTLY AT ANY SPEED FROM 45-80MPH. TOOK TO A MECHANIC SAID THE FRONT END NEEDED TO BE REPLACED. $800.00 LATER IT STILL DID IT, THEN TOOK BACK SAID THE TIRES NEEDED TO BE REPLACED ALTHOUGH WE HAD 80,000 MILE TIRES, AND ONLY HAD 35,000 MILES PUT ON THEM. REPLACED THE TIRES FOR $600.00. STILL SHOOK, TOOK TO A DIFFERENT MECHANIC SAID IT WAS THE TRANSMISSION FAILING. DURING SCHEDULED MAINTENANCE FOUND CRACKED INTAKE MANIFOLD, ANTIFREEZE AND OIL IN SPARK PLUGS, CLEANED OUT CHANGED SPARK PLUGS, RAN FINE UNTIL THE MANIFOLD LEAKED MORE COOLANT INTO THE SPARK PLUGS AND NOW WE ARE AT SQUARE ONE. RESEARCHED ONLINE FOUND A BUNCH OF PLACES SAYING IT WAS RECALLED, WHEN I CALLED THE DEALERSHIP THEY SAID NO RECALLS. PRICE OF REPLACING THE PART WAS $615.00 IF I HAD ONE ALTERNATOR, OR $650.00 IF I HAD ANOTHER. *TR”
“WHILE DRIVING, (AT ANY SPEED)THE CAR'S ENGINE SHUT DOWN SEVERAL TIMES. EACH TIME I HEARD A "BEEP" AND WARNING LIGHTS CAME ON- CHECK ENGINE, TRACTION CONTROL AND ABS. AFTER A MINUTE OR SO, THE ENGINE WOULD START NORMALLY. THE ENGINE SHUT DOWN 6 TIMES ! EACH TIME I HEARD THE "BEEP" AND WARNING LIGHTS ILLUMINATED INCLUDING TRACTION CONTROL AND CHECK ENGINE LIGHTS. I WAS ON MY WAY HOME WITH MY NEWBORN IN THE CAR,IT JUST CUTS OFF, AND IT NEARLY CAUSED AN ACCIDENT ON THE HIGHWAY AS MANY OTHER CARS ALMOST RAN INTO ME BECAUSE THE CAR SHUT OFF WHILE I WAS DRIVING ON THE HIGHWAY. THIS IS A VERY DANGEROUS CONDITION, ESPECIALLY AS POWER STEERING AND POWER BRAKES ARE LOST ON SHUT-DOWN. I AM LITERALLY AFRAID OF DRIVING MY VEHICLE AS NO ONE KNOWS WHAT IS WRONG WITH MY VEHICLE. THIS NEEDS TO BE ADDRESSED ASAP AS SOMEONE COULD GET SERIOUSLY HURT OR KILLED. INCLUDING CHILDREN!....BY THE WAY, THIS HAS BEEN HAPPENING ALL WEEK. *TR”
“I RECEIVED NOTICED OF INTAKE MANIFOLD ON FORDS PASSENGERS CARS FAILURE AND OF THE SETTLEMENT OFFERED TO REPAIR AND WARRANT SAID INTAKE MANIFOLD. AT THAT TIME I OWNED A 1999 GRAND MARQUIS LS. BEFORE GETTING SAID NOTICE I HAD TOOK MY CAR TO LANDERS FORD DEALERSHIP IN JACKSON,MS HWY 80 WEST WHERE THE INTAKE MANIFOLD WAS REPAIRED BY DEALERSHIP BECAUSE OF FAILURE OUT OF POCKET EXPENSE COST ME $879.00 WHEN I RECEIVED NOTICED OF LAWSUIT AND OR CLAIMS ON SAID INTAKEMANIFOLD I RETURNED TO THAT DEALERSHIP BUT WAS TURNED AWAY WITH NO RESOLVE SAID DEALERSHIP WENT OUT OF BUSINESS MONTHS LATER NEVER TO COMPENSATE ME FOR OUT OF POCKET EXPENSE OR GIVING ME EXTENDED WARRANTY INFO.FORD CORPORATE OFFICE REFUSE TO HELP AFTER I EXPLAIN I HAD MY RECEIPTS TO SAID CLAIM AND GAVE ME NO LEAD WAY OF WHAT TO DO.NOW I AM STUCK WITH NO WARRANTY NO OUT OF POCKET COST AND THE SAME CAR NEEDING THE SAME WORK DONE AGAIN HERE IN 2011 FORD HANDLED THIS LAWSUIT CLAIMS VERY VERY POORLY AND INFO HAS IT THAT FORD HAS STOP MAKING THE GRAND MARQUIS AND CROWN VICTORIA. *TR”
Showing 6 of 29 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.