NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
56 reports52,000 miles · Apr 10, 2006
Visibility
STEERING WHEEL BEGAN TO SHAKE AND VISIBLE FUMES BEGAN ENTERING VEHICLE THROUGH AIR VENTS. THERE WAS A STRONG STENCH OF ANTI-FREEZE. CHECK ENGINE LIGHT WAS ON AND VEHICLE BECAME HARD TO CONTROL. AFTER TAKING CAR TO LOCAL DEALERSHIP, I WAS IMMEDIATELY TOLD, EVEN BEFORE AN INSPECTION WAS DONE, THAT THE HEATER CORE ON VEHICLE HAD A …
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STEERING WHEEL BEGAN TO SHAKE AND VISIBLE FUMES BEGAN ENTERING VEHICLE THROUGH AIR VENTS. THERE WAS A STRONG STENCH OF ANTI-FREEZE. CHECK ENGINE LIGHT WAS ON AND VEHICLE BECAME HARD TO CONTROL. AFTER TAKING CAR TO LOCAL DEALERSHIP, I WAS IMMEDIATELY TOLD, EVEN BEFORE AN INSPECTION WAS DONE, THAT THE HEATER CORE ON VEHICLE HAD A SLOW LEAK THAT OVER THE COURSE OF "SEVERAL MONTHS" THAT EVENTUALLY LEAKED ON TO THE TRANSMISSION ELECTRIC BOX AND SHORTED OUT THE ENTIRE SYSTEM. IT SEEMED OBVIOUS THAT THIS WAS A FAMILIAR ISSUE WITH THIS PARTICULAR VEHICLE. I WAS ORIGINALLY GIVEN AN ESTIMATE OF $3,300, BEING THAT THE VEHICLE WAS PAST ITS WARRANTY PERIOD. AFTER SEVERAL CALLS TO OWNER OF DEALERSHIP AND DOING RESEARCH ON THIS VEHICLES COMPLAINT HISTORY, THE PRICE WAS REDUCED 3 SEPARATE TIMES, FINALLY COSTING ME $880. APPARENTLY, MITSUBISHI HEADQUARTERS PICKED UP THE COST OF THE PARTS, LEAVING ME TO PAY LABOR CHARGES. THE MECHANIC HANDLING THE REPAIR STATED THAT DUE TO "POOR DESIGN" ON THIS PARTICULAR VEHICLE, AND EVEN WITH OUR REGULAR MAINTENANCE CHECKS AT THE DEALERSHIP, THIS PROBLEM CANNOT POSSIBLY BE RECOGNIZED OR DIAGNOSED IN ITS EARLY STAGES UNTIL IT HAS CAUSED EXTENSIVE DAMAGE. NEEDLESS TO SAY, THIS WILL BE MY LAST MITSUBUSHI. *JB
NHTSA ODI #10154930
Mileage unknown · Mar 6, 2006
Visibility
MITSUBISHI 2003 DIAMANTE. DEFROSTER/DEFOGGER : HEATER CORE WINDOWS WERE NOT CLEARING PROPERLY WITH DEFROSTER. WINDOWS SEEMED TO FROST UP AND STRONG SMELL LIKE BURNING WIRES. FOUND OUT THAT ANTIFREEZE WAS LEAKING INTO THE PASSENGER SIDE OF THE CAR AND HEATER CORE AND SEALS NEED TO BE REPLACED. $900 TO REPAIR WITH 75% OF THIS…
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MITSUBISHI 2003 DIAMANTE. DEFROSTER/DEFOGGER : HEATER CORE WINDOWS WERE NOT CLEARING PROPERLY WITH DEFROSTER. WINDOWS SEEMED TO FROST UP AND STRONG SMELL LIKE BURNING WIRES. FOUND OUT THAT ANTIFREEZE WAS LEAKING INTO THE PASSENGER SIDE OF THE CAR AND HEATER CORE AND SEALS NEED TO BE REPLACED. $900 TO REPAIR WITH 75% OF THIS AMOUNT IN LABOR! APPARENTLY THIS IS A PROBLEM WITH THESE CARS SINCE 1998. THE SMELL IN THE CAR CAN'T BE GOOD FOR YOU AND I FEEL NAUSEATED AND DIZZY WHILE DRIVING. HAVE TO KEEP THE WINDOWS OPEN IN 32 DEGREE WEATHER IN ORDER TO USE THE CAR. DEALER SAYS THE SMELL WILL REMAIN FOR AT LEAST 2 WEEKS. SEEMS THE MANUFACTURER SHOULD DO SOMETHING ABOUT THIS ONGOING PROBLEM. *NM
NHTSA ODI #10152060
38,000 miles · Nov 23, 2005
Air BagsCrashInjury
AIR BAG DID NOT DEPLOY IN 55 MPH DIRECT FRONT END COLLISION. *JB
NHTSA ODI #10143534
6,000 miles · Sep 22, 2005
Service Brakes, Hydraulic
WHEN BRAKES APPLIED THE CAR SHAKES SO BAD YOU CAN'T CONTROL IT. BRAKES WERE WORKED ON BY MITSUBISHI 3 TIMES THEN REPLACED BRAKES AND THEY ARE BAD AGAIN. *JB
NHTSA ODI #10137295
15,000 miles · Aug 25, 2005
Equipment
WHEN I APPLY THE BRAKES, THE CAR SHAKES AND JERKS UNCONTROLLABLY. I HAVE HAD WORK DONE ON THE ROTORS AS WELL AS THE BRAKES. I HAVE LESS THAN 20K MILES ON THE CAR. IT IS HIGHLY UNUSUAL TO HAVE 4 WARPED ROTORS WITHOUT SOME TYPE OF MANUFACTURING DEFECT.
NHTSA ODI #10134166
Mileage unknown · Aug 2, 2005
Visibility
ABOUT A MONTH AND A HALF AGO I NOTICED AN ODD SMELL IN MY CAR. NOT REALIZING WHAT IT WAS I CONTINUED TO DRIVE MY CAR. THEN A WEEK AGO MY CAR STARTED TO OVER HEAT BECAUSE I DIDN'T HAVE ANY COOLANT. I ALSO NOTICED A FILM ON MY WINDOWS. I HAVE A MAT UNDER THE CAR AND HAVEN'T NOTICED ANYTHING LEAKING ON TO THE GROUND. MY CAR IS A 20…
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ABOUT A MONTH AND A HALF AGO I NOTICED AN ODD SMELL IN MY CAR. NOT REALIZING WHAT IT WAS I CONTINUED TO DRIVE MY CAR. THEN A WEEK AGO MY CAR STARTED TO OVER HEAT BECAUSE I DIDN'T HAVE ANY COOLANT. I ALSO NOTICED A FILM ON MY WINDOWS. I HAVE A MAT UNDER THE CAR AND HAVEN'T NOTICED ANYTHING LEAKING ON TO THE GROUND. MY CAR IS A 2003 MITSUBISHI DIAMANTE WITH 59,0000. AFTER HAVING MY CAR LOOKED AT FURTHER IT IS APPARENT MY HEATER CORE HAS FAILED. *JB
NHTSA ODI #10131147
40,000 miles · Apr 17, 2005
Electrical SystemExterior LightingLatches/locks/linkages
CAR DOORS ARE LOCKING BY THEMSELVES, THE ALARM FOR KEYS BEING LEFT IN THE IGNITION NO LONGER SOUNDS, THE AUTOMATIC UNLOCK WHEN KEYS LEFT IN THE IGNITION NO LONGER WORKS, AND THE HEADLIGHTS DO NOT TURN OFF WHEN THE CAR IS TURNED OFF AND DOOR OPENED. HAVE BEEN STRANDED SEVERAL TIMES DUE TO KEYS LOCKED IN THE CAR, AND A DEAD BATTE…
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CAR DOORS ARE LOCKING BY THEMSELVES, THE ALARM FOR KEYS BEING LEFT IN THE IGNITION NO LONGER SOUNDS, THE AUTOMATIC UNLOCK WHEN KEYS LEFT IN THE IGNITION NO LONGER WORKS, AND THE HEADLIGHTS DO NOT TURN OFF WHEN THE CAR IS TURNED OFF AND DOOR OPENED. HAVE BEEN STRANDED SEVERAL TIMES DUE TO KEYS LOCKED IN THE CAR, AND A DEAD BATTERY DUE TO HEADLIGHTS BEING LEFT ON.*AK
NHTSA ODI #10117995
Mileage unknown · Apr 17, 2005
Suspension
VEHICLE FRONT END SHIFTS BACK AND FORTH WHEN BEHIND TRACTOR TRAILERS ON HIGHWAY. SITUATION IS DANGEROUS WHEN TRACTOR TRAILER PULLS OUT IN FRONT OF ME. NOT DUE TO TAILGATING, SINCE IT IS THE WORST WHEN APPROXIMATELY 5 CAR LENGTHS ARE BETWEEN TRACTOR TRAILER AND ME. CAR IS DIFFICULT TO CONTROL DUE TO SHIFTING. FRONT END WAS CH…
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VEHICLE FRONT END SHIFTS BACK AND FORTH WHEN BEHIND TRACTOR TRAILERS ON HIGHWAY. SITUATION IS DANGEROUS WHEN TRACTOR TRAILER PULLS OUT IN FRONT OF ME. NOT DUE TO TAILGATING, SINCE IT IS THE WORST WHEN APPROXIMATELY 5 CAR LENGTHS ARE BETWEEN TRACTOR TRAILER AND ME. CAR IS DIFFICULT TO CONTROL DUE TO SHIFTING. FRONT END WAS CHECKED AND THERE ARE NO ALIGNMENT PROBLEMS, AND TIRES HAVE BEEN REPLACED. SHIFTING CONTINUES TO OCCUR EVEN WITH TRACTION CONTROL TURNED OFF. AERODYNAMICS PROBLEM OR VEHICLE STABILITY PROBLEM? ALSO OWN A 1998 DIAMANTE THAT DOES NOT HAVE THIS PROBLEM. PROBLEM HAS OCCURRED SINCE VEHICLE PURCHASE AND SEVERITY OF PROBLEM HAS REMAINED THE SAME.*AK
NHTSA ODI #10117994
30,000 miles · Mar 22, 2005
Service Brakes, HydraulicSuspension
WHEN I APPLY THE BRAKES, THE CAR SHAKES AND JERKS UNCONTROLLABLY. I HAVE HAD WORK DONE ON THE ROTORS AS WELL AS THE BRAKES. I HAVE FOUR NEW TIRES, BUT PROBLEM STILL OCCURS. I AM AFRAID THAT ONE DAY WHILE DRIVING THIS CAR THE BRAKES WILL FAIL AND CAUSE MY FAMILY AND I SERIOUS INJURY . THIS IS A 2003 MITSUBISHI DIAMANTE, AND THE …
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WHEN I APPLY THE BRAKES, THE CAR SHAKES AND JERKS UNCONTROLLABLY. I HAVE HAD WORK DONE ON THE ROTORS AS WELL AS THE BRAKES. I HAVE FOUR NEW TIRES, BUT PROBLEM STILL OCCURS. I AM AFRAID THAT ONE DAY WHILE DRIVING THIS CAR THE BRAKES WILL FAIL AND CAUSE MY FAMILY AND I SERIOUS INJURY . THIS IS A 2003 MITSUBISHI DIAMANTE, AND THE INCIDENTS HAVE OCCURRED DAILY 3 MONTHS AFTER I PURCHASED THE VEHICLE.*AK
NHTSA ODI #10114500
47,773 miles · Feb 10, 2005
Visibility
VEHICLE EXPERIENCED A PROBLEM WITH THE HEATER COIL. ANTI-FREEZE WAS GETTING INTO VENT, AND THE VAPORS FOGGED UP THE WINDOWS, INTERRUPTING THE VISIBILITY. OWNER CONTACTED THE MANUFACTURER, WHO REFUSED ASSISTANCE BECAUSE THE VEHICLE WAS OUT OF WARRANTY. *AK
NHTSA ODI #10111321