Problems · by component
2001 Mitsubishi Diamante visibility problems
56 owner complaints to NHTSA about the 2001 Mitsubishi Diamante cite visibility, 72% of all 78 complaints for this model year.
Complaints
56
72% of all complaints
Crashes
0
Reported by owners
Fires
0
Reported by owners
Injuries
3
Reported by owners
What owners say about the visibility
Verbatim from NHTSA complaints, newest first
“WINDOWS ARE FOGGING UP DO T A FAULTY HEATER CORE. I REALLY DON'T MIND REPAIRING THE CAR SEEING THAT IT HAS 120K ON IT.. I PURCHASED THE CAR BRAND NEW AND THIS WILL BE THE 3RD HEATER CORE!!! WHAT'S GOING ON! *TR”
“MITSUBISHI DIAMANTE INFAMOUS HEATER CORE PROBLEM ANTIFREEZE LEAKS INTO INTERIOR OF CAR. HORRIBLE SICKENING ANTI FREEZE SMELL, HAPPENS ON AN ABUNDANCE OF MITSUBISHI CARS. *TR”
“HEATER CORE IS CAUSING THE WINDOWS TO FOG UP, THE CAR TO SMELL LIKE ANTIFREEZE AND MAY BE DAMAGING THE ECU. THERE ARE HUNDREDS OF POSTS ONLINE ABOUT PEOPLE HAVING THIS PROBLEM OVER AND OVER WITH THIS CAR. IT IS CLEARLY A MANUFACTURERS DEFECT AND CUSTOMERS ARE LEFT PAYING THOUSANDS OF DOLLARS FO THE REPAIR. *TR”
“MY 2001 MITSUBISHI DIAMANTE'S HEATER CORE WENT UP. I HAVE MASSIVE AMOUNTS OF COOLANT LEAKING ON MY PASSENGER SIDE, THICK SMOKE COMING FROM MY VENTS AND A BAD ODOR COMING FROM THE VENTS. I HAVE READ THIS IS A VERY VERY COMMON THING WITH MITSUBISHI'S ESPECIALLY DIAMANTE'S. *TR”
“JUST RECENTLY STARTED HAVING REALLY FOGGY WINDOWS AND STARTED TO NOTICE SWEET SMELL COMING FROM CAR WHEN HEATER/DEFROST WAS TURNED ON. NOTIFIED DEALER OF PROBLEM AND DEALER QUICKLY IDENTIFIED PROBLEM AS HEATER CORE DEFECT. *TR”
“TL*THE CONTACT OWNS A 2001 MITSUBISHI DIAMANTE. THE WINDOWS FOGGED UP WHEN THE AIR AND HEAT WERE ACTIVATED. THE PASSENGERS COULD SMELL ANTIFREEZE. THE DEALER STATED THAT THE HEATER CORE FAILED DUE TO DEFECTIVE O-RINGS AND NOTICED ANTIFREEZE LEAKING ONTO THE MICRO PROCESSOR. THE MICRO PROCESSOR AND HEATER CORE WERE REPLACED. THE FAILURE MILEAGE WAS 70,000 AND CURRENT MILEAGE WAS 75,000.”
Showing 6 of 56 reports. Read every report on NHTSA.gov.
Data from NHTSA Complaints API (owner reports, unverified) · synced Oct 28, 2026NHTSA vehicle page
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.