Problems · by component
2003 BMW X5 engine and engine cooling problems
25 owner complaints to NHTSA about the 2003 BMW X5 cite engine and engine cooling, 22% of all 115 complaints for this model year.
Complaints
25
22% of all complaints
Crashes
0
Reported by owners
Fires
1
Reported by owners
Injuries
0
Reported by owners
What owners say about the engine and engine cooling
Verbatim from NHTSA complaints, newest first
“OIL SEPARATOR MALFUNCTIONED IN COLD TEMPERATURES. WHEN DRIVING EXPERIENCED SMOKE UNDER THE HOOD AND WAS FORCED TO PULL OVER. DROVE SLOWLY WITH HAZARDS TO NEAREST MECHANIC AND INCURRED $1,955 IN REPAIR CHARGE. MECHANIC INFORMED ME THAT THIS WAS BECOMING A POPULAR DEFECT WITH THE OEM OIL SEPARATOR ON THIS MAKE AND MODEL. *KB”
“TL* THE CONTACT OWNS A 2003 BMW X5. THE CONTACT STATED THAT THE TIMING CHANGE FRACTURED. THE VEHICLE WAS TAKEN TO THE DEALER WHO STATED THAT THE TIMING CHANGE NEEDED TO BE REPLACED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 90,000.”
“WHILE TRAVELING IN THE MIDDLE LANE OF TRAFFIC AT 55 MPH MY BMW X5 STARTED POURING SMOKE FROM THE EXHAUST AND COMPLETELY SHUT DOWN LEAVING ME HELPLESS WITH NO POWER ON A MAJOR HIGHWAY. *TR”
“2003 BMW X5 RADIATOR CRACKED DURING DRIVING AND WATER SPILLED. CAR WAS IDLING AND SMOKY SMELL AND OIL PRESS, STOP ENGINE PROBLEMS. HAD 2 CHILDREN IN THE CAR WHILE DRIVING AND SEEMS LIKE CONNECTION/HOSE PROBLEMS WHICH DO NOT ALLOW THE ENGINE TO WORK PROPERLY. DO NOT FEEL SAFE DRIVING THE CAR, WON'T HOLD THE COOLANT WATER IN. A CAR THIS EXPENSIVE SHOULD NOT BE SO DEFECTIVE. *TR”
“TL* THE CONTACT OWNS A 2003 BMW X5. THE CONTACT STATED THAT WHILE DRIVING 35 MPH THERE WAS SMOKE COMING FROM UNDER THE HOOD AND EXHAUST PIPE. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THE CONTACT WAS ADVISED THAT THE OIL SEPARATOR WAS LEAKING AND DRAINED ONTO THE EXHAUST PIPE AND ENGINE ABNORMALLY, CAUSING THE FAILURE. THE CONTACT STATED THAT THE FAILURE WOULD ONLY OCCUR IN COLD TEMPERATURES. THE OIL SEPARATOR WAS REPAIRED. THE MANUFACTURER WAS CONTACTED WHO OFFERED NO ASSISTANCE. THE FAILURE MILEAGE WAS 74,200.”
“TL*THE CONTACT OWNS A 2003 BMW X5. THE CONTACT STATED THAT WHILE DRIVING 30 MPH SMOKE STARTING COMING THROUGH THE VENTS WITHOUT ANY WARNINGS. THE VEHICLE WAS TAKEN TO THE DEALER WHO DIAGNOSED THAT THE CCV VALVE FROZE CAUSING AN OIL SPILLAGE. THE MANUFACTURER WAS NOT CONTACTED. THE VEHICLE WAS NOT REPAIRED. THE FAILURE AND CURRENT MILEAGES WERE 58,076. UPDATED 3/14/11 *CN ACCORDING TO THE INVOICE, THE VALVE COVER GASKET WAS LEAKING OIL EXCESSIVELY. UPDATED 06/24/11”
Showing 6 of 25 reports. Read every report on NHTSA.gov.
Data from NHTSA Complaints API (owner reports, unverified) · synced Oct 30, 2026NHTSA vehicle page
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.