Problems · by component
2003 Chevrolet Monte Carlo engine problems
31 owner complaints to NHTSA about the 2003 Chevrolet Monte Carlo cite engine, 20% of all 157 complaints for this model year.
Complaints
31
20% of all complaints
Crashes
0
Reported by owners
Fires
9
Reported by owners
Injuries
0
Reported by owners
What owners say about the engine
Verbatim from NHTSA complaints, newest first
“The service manager told me the Engine cover will be removed and NOT replaced. This downgrades the vehicle as the engine cover is part of the appearance element and gives a certain amount of protection to some components and wiring harnesses. It will soon be a Classic and the engine cover is part of the original equiptment that needs to be on it. There is NO logical reason the valve cover gasket cannot be replaced AND keep the engine cover in place. Thank you for your help.”
“Vehicle stalls when starting. While driving vehicle may shut off when moving on highway if you are not pushing on gas pedal. May be due to faulty EGR or emissions component”
“TAKATA RECALL. WELL I NOTICED IT DROPPING OIL ONTO THE ENGINE & INTAKE 12/5/2018 AND NOW IT SEEMS LIKE IT'S BEEN GETTING WORSE CUZ IT'S GETS SO HOT IT STARTS SMOKING FROM THE OIL ON THE ENGINE INTAKE I'M STILL DRIVING THE CAR”
“TL* THE CONTACT OWNS A 2003 CHEVROLET MONTE CARLO. WHILE DRIVING VARIOUS SPEEDS, THE VEHICLE STALLED WITHOUT WARNING. THE FAILURE WAS NOT DIAGNOSED OR REPAIRED. THE LOCAL DEALER AND MANUFACTURER WERE NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 143,000.”
“TL* THE CONTACT OWNS A 2003 CHEVROLET MONTE CARLO. AFTER THE VEHICLE RECEIVED AN OIL CHANGE, OIL WAS SEEN LEAKING FROM THE ENGINE. IN ADDITION, THE VEHICLE OVERHEATED, THE CHECK ENGINE WARNING INDICATOR ILLUMINATED, AND SMOKE EMERGED FROM THE HOOD. THE CONTACT STATED THAT, AFTER REPLACING THE RADIATOR, THERE WAS A COOLANT LEAK. THE CONTACT ALSO STATED THAT THE KEY FOB FAILED TO WORK. FURTHERMORE, THE TIRES WERE REPLACED AND ROTATED, BUT THE TIRE PRESSURE WARNING INDICATOR REMAINED ILLUMINATED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE IT WAS DIAGNOSED THAT THE OIL LEAK WAS DUE TO A FAULTY CATALYTIC CONVERTER. THE VEHICLE WAS NOT REPAIRED. A DEALER WAS NOT CONTACTED. THE MANUFACTURER WAS INFORMED AND DID NOT ASSIST. THE FAILURE MILEAGE WAS 174,034.”
“TL* THE CONTACT OWNS A 2003 CHEVROLET MONTE CARLO. WHEN THE VEHICLE WAS STARTED, IT SHOOK. THE VEHICLE WAS DRIVEN TO THE DEALER (WHITE ALLEN CHEVROLET, 442 N. MAIN ST, DAYTON, OH 45405) FOR DIAGNOSTIC TESTING. THE DEALER AKNOWLEDGED THE FAILURE AND THE VEHICLE WAS NOT REPAIRED. THE CONTACT REFERENCED NHTSA CAMPAIGN NUMBER: 15V701000 (ENGINE AND ENGINE COOLING) AS A POSSIBLE SOLUTION, BUT THE VIN WAS EXCLUDED FROM THE RECALL. THE MANUFACTURER WAS NOTIFIED. THE VIN WAS UNKNOWN. THE FAILURE MILEAGE WAS 94,968.”
Showing 6 of 31 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.