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2001 Mitsubishi Diamante

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2001 Mitsubishi Diamante do not stand out strongly from the model-year median of 31.5.

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How this year compares

Owner complaints by model year

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Counts vary with age, sales and reporting. They are not failure rates.

What owners reported most

All reported categories

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When problems were reported

Mileage at the reported incident

57 reports with mileage · 21 unknown

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Visibility. Review the 56 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine And Engine Cooling. Review the 14 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Power Train. Review the 4 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

0 crash reports0 fire reports3 injury reports

What owners actually said

78 reports
75,000 miles · Jan 26, 2007
Engine And Engine CoolingVisibility

ANTI FREEZE ODOR IS OVERWHELMING IN THE CAR, ESPECIALLY WHEN THE HEATER IS RUN. I HAVE HAD THE CAR SINCE IT WAS NEW, AND HAD THE SAME PROBLEM AFTER ONLY A COUPLE OF MONTHS. THE DEALERSHIP FIXED THE ISSUE BY INSTALLING A NEW GASKET, BUT THE FIX HAS LASTED ONLY A COUPLE OF YEARS. MY WIFE AND I HAVE BEEN HAVING A VARIETY OF RES…

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ANTI FREEZE ODOR IS OVERWHELMING IN THE CAR, ESPECIALLY WHEN THE HEATER IS RUN. I HAVE HAD THE CAR SINCE IT WAS NEW, AND HAD THE SAME PROBLEM AFTER ONLY A COUPLE OF MONTHS. THE DEALERSHIP FIXED THE ISSUE BY INSTALLING A NEW GASKET, BUT THE FIX HAS LASTED ONLY A COUPLE OF YEARS. MY WIFE AND I HAVE BEEN HAVING A VARIETY OF RESPIRATORY ILLNESSES RECENTLY, AND I BELIEVE THESE FUMES ARE A CONTRIBUTING FACTOR. *JB

NHTSA ODI #10180810

Mileage unknown · Dec 24, 2006
Visibility

2001 MITSUBISHI DIAMANTE WITH 44K MILES - HEATER CORE FAILED AND A FEW WEEKS LATER THE TRANSMISSION CONTROL DEVICE FAILED. THIS IS DUE TO LEAKING FLUID FROM THE HEATER CORE DIRECTLY ONTO A COMPUTER COMPONENT THAT HAS NO COVER. THIS VEHICLE SHOULD BE RECALLED AND MITSUBISHI SHOULD PAY FOR THE REPAIRS (ABOUT $2000). *NM

NHTSA ODI #10176887

Mileage unknown · Oct 12, 2006
EquipmentVisibility

RECENTLY PURCHASED A 2001 MITSUBISHI DIAMANTE WITH 62K MILES. ADMITTEDLY, I AM NOT CAR "SAVVY" RELATED TO THE WELL BEING OF THE CAR. WHEN PURCHASED, THE CAR HAD A "MAPLE SYRUP" TYPE SMELL. ALSO, THE WINDOWS FOGGED UP VERY QUICKLY AND EVENTUALLY I REALIZED THE HEAT TOOK A LONG TIME TO WARM UP. AS I PURCHASED THE CAR IN THE SU…

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RECENTLY PURCHASED A 2001 MITSUBISHI DIAMANTE WITH 62K MILES. ADMITTEDLY, I AM NOT CAR "SAVVY" RELATED TO THE WELL BEING OF THE CAR. WHEN PURCHASED, THE CAR HAD A "MAPLE SYRUP" TYPE SMELL. ALSO, THE WINDOWS FOGGED UP VERY QUICKLY AND EVENTUALLY I REALIZED THE HEAT TOOK A LONG TIME TO WARM UP. AS I PURCHASED THE CAR IN THE SUMMER, THE FOGGING AND HEAT PROBLEM WAS NOT NOTICED FOR TWO MONTHS. I HAVE NOW REALIZED THAT THE PROBLEM HAS TO DO WITH THE HEATER CORE. I HAVE TALKED TO PEOPLE WHO ARE CAR "SAVY" AND THEY SAY CARS SHOULDN'T HAVE PROBLEMS WITH A HEATER CORE UNTIL LATE IN THEIR LIVES (ABOVE 120K MILES), IF EVER. AS I DISCOVERED MY PROBLEM, I REALIZE THAT I HAVE BEEN INHALING ANTI FREEZE GAS THROUGH THE HEAT VENTS. I'M WORRIED THAT I WILL HAVE RESPIRATORY PROBLEMS BECAUSE OF THIS. HAS MITSUBISHI TAKEN RESPONSIBILITY FOR THIS SEVERE MISHAP? I HAVE RESEARCHED AND FOUND THAT THIS IS AN EXTREMELY PREVALENT PROBLEM IN MOST DIAMANTES. NOT ONLY IS THIS EXTREMELY DETRIMENTAL TO ONES HEALTH, IT'S AN EXPENSIVE FIX. IS THERE ANY HOPE FOR A RECALL HERE? *JB

NHTSA ODI #10170698

86,300 miles · Feb 27, 2006
Visibility

DT*: THE CONTACT STATED WHILE DRIVING AN ODOR OF ANTIFREEZE ENTERED THE VEHICLE AND THE WINDOW WERE FOGGING UP. THE VEHICLE WAS TAKEN TO THE DEALERSHIP FOR INSPECTION. THE DEALERSHIP REPLACED THE HEATER CORE O-RINGS. THE MANUFACTURER WAS NOT ALERTED. UPDATED 3/28/2006 - *NM

NHTSA ODI #10151331

40,500 miles · Feb 18, 2006
Visibility

AT APPROXIMATELY 40,000 MILES, MY 2001 MITSUBISHI DIAMANTE HEATER CORE STARTED LEAKING. THE FIRST INDICATION WAS THAT THE WINDSHIELD STARTED FOGGING UP IMMEDIATELY. THIS WAS IN THE WINTER (FEBRUARY, MINNESOTA) AND THE DEFROSTER MADE IT WORSE, DRIVING WAS DIFFICULT AT BEST. I WAS LUCKY IN THAT I WAS CLOSE TO HOME. HAD I BEEN …

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AT APPROXIMATELY 40,000 MILES, MY 2001 MITSUBISHI DIAMANTE HEATER CORE STARTED LEAKING. THE FIRST INDICATION WAS THAT THE WINDSHIELD STARTED FOGGING UP IMMEDIATELY. THIS WAS IN THE WINTER (FEBRUARY, MINNESOTA) AND THE DEFROSTER MADE IT WORSE, DRIVING WAS DIFFICULT AT BEST. I WAS LUCKY IN THAT I WAS CLOSE TO HOME. HAD I BEEN ON THE FREEWAY, IT COULD HAVE BEEN MORE DANGEROUS. A CALL TO ONE OF THE LOCAL DEALERS INFORMED ME THAT THE COST FOR THE FIX WAS OVER $1000. RESEARCH THAT I DID ON THE INTERNET SHOWED THAT THIS WAS A VERY COMMON FAILURE AND THAT MOST DEALERSHIPS PREFER TO CHARGE THE CUSTOMER OUTRAGEOUS BILLS FOR FIXING WHAT IS OBVIOUSLY A MANUFACTURING DEFECT. NOT BEING ABLE TO AFFORD A BILL OF THIS SIZE, I FOUND A WAY TO FIX THE PROBLEM MYSELF, BUT IT WAS NOT EASY. I'VE FOUND MITSUBISHI IS NOT EASY TO DEAL WITH. MY GUESS IS THAT BECAUSE THEY NO LONGER SELL THIS MODEL, THEY WILL TAKE ADVANTAGE OF CUSTOMERS THAT ARE OWNERS OF THE DIAMANTE. I WILL NEVER BUY ANOTHER CAR FROM THIS MANUFACTURER. *NM

NHTSA ODI #10150578

Mileage unknown · Jan 26, 2006
Visibility

WE NOTICED BLACK RESIDUE ON THE REAR WINDSHIELD OF 2001 DIAMANTE. THE NEXT DAY WHEN THE DEFROSTER WAS TURNED ON BLACK SMOKE FILLED THE INSIDE OF THE CAR. THE FOLLOWING DAY BLACK SMOKE FILLED THE CAR WITHOUT THE DEFROSTER BEING ON. HAD THE CAR TOWED, AND THEY TOLD US IT WAS THE HEATER CORE HAVING A HOLE IN IT. THEY HAD ANOTH…

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WE NOTICED BLACK RESIDUE ON THE REAR WINDSHIELD OF 2001 DIAMANTE. THE NEXT DAY WHEN THE DEFROSTER WAS TURNED ON BLACK SMOKE FILLED THE INSIDE OF THE CAR. THE FOLLOWING DAY BLACK SMOKE FILLED THE CAR WITHOUT THE DEFROSTER BEING ON. HAD THE CAR TOWED, AND THEY TOLD US IT WAS THE HEATER CORE HAVING A HOLE IN IT. THEY HAD ANOTHER 2001 DIAMANTE SITTING THERE WITH THE EXACT SAME PROBLEM. SINCE IT WASN'T UNDER WARRANTY, WE BOUGHT IT CERTIFIED IN DECEMBER, IT WILL COST APPROXIMATELY $875 TO FIX IT. *AK

NHTSA ODI #10148783

47,971 miles · Nov 6, 2005
VisibilityInjury

ABNORMAL SMELL COMING FROM VENTS, MADE ME, AND MY TWO SONS FEEL NAUSEOUS, CREATED A HEADACHE FOR ME. I HAD TO OPEN WINDOWS IN ORDER TO DRIVE CAR DUE TO FUMES. BROUGHT CAR TO DEALER, AND HEATER CORE WAS IDENTIFIED AS PROBLEM AND NEEDED TO BE REPLACED. DEALER SAID THIS IS A VERY COMMON PROBLEM WITH THIS YEAR AND MODEL. I ASKED IF …

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ABNORMAL SMELL COMING FROM VENTS, MADE ME, AND MY TWO SONS FEEL NAUSEOUS, CREATED A HEADACHE FOR ME. I HAD TO OPEN WINDOWS IN ORDER TO DRIVE CAR DUE TO FUMES. BROUGHT CAR TO DEALER, AND HEATER CORE WAS IDENTIFIED AS PROBLEM AND NEEDED TO BE REPLACED. DEALER SAID THIS IS A VERY COMMON PROBLEM WITH THIS YEAR AND MODEL. I ASKED IF THERE WAS A MANUFACTURER RECALL AND HE SAID NO, THEY ONLY HAD TO DO A RECALL IF IT WAS A SAFETY PROBLEM. THIS COST $802.37 TO REPAIR. THIS IS MOST DEFINITELY A SAFETY ISSUE. NOT ONLY HEALTH, BUT CAN CAUSE AN ACCIDENT DUE TO FOGGING OF WINDOWS, ETC. I AM SURE MITSUBISHI KNOWS OF THIS PROBLEM. SEEMS AS THOUGH A CLASS ACTION SUIT SHOULD BE FILED AGAINST THEM FOR THIS ISSUE. MY CAR ONLY HAS 47K MILES, I PURCHASED NEW AND IT HAS HAD ALL REGULAR MAINTENANCE REQUIRED. THIS IS OBVIOUSLY A MANUFACTURERS DEFECT. I WILL NEVER PURCHASE ANOTHER MITSUBISHI, JUST BECAUSE THEY DO NOT TAKE RESPONSIBILITY. *NM

NHTSA ODI #10141862

30,162 miles · Oct 30, 2005
Visibility

NOTICED SMELL OF ANTIFREEZE IN THE PASSENGER COMPARTMENT. FRONT WINDSHIELD FOGS UP AFTER CAR IS DRIVEN AND THE MOTOR IS TURNED OFF. WIPING OFF THE MOISTURE IS THE ONLY WAY TO REMOVE IT. READ ABOUT THE HEATER CORE PROBLEMS ON THE WEB AND TOOK THE CAR IN TO BE REPAIRED FOR THIS SPECIFIC PROBLEM. CORE SEALS WERE REPLACED OCT 20…

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NOTICED SMELL OF ANTIFREEZE IN THE PASSENGER COMPARTMENT. FRONT WINDSHIELD FOGS UP AFTER CAR IS DRIVEN AND THE MOTOR IS TURNED OFF. WIPING OFF THE MOISTURE IS THE ONLY WAY TO REMOVE IT. READ ABOUT THE HEATER CORE PROBLEMS ON THE WEB AND TOOK THE CAR IN TO BE REPAIRED FOR THIS SPECIFIC PROBLEM. CORE SEALS WERE REPLACED OCT 2003, THE FIRST REPAIR, BUT SMELL OF COOLANT REMAINED. TWO ADDITIONAL ATTEMPTS AT REPAIR WERE MADE, INCLUDING "CLEANING" OF THE CORE, BUT SMELL REMAINS TO THIS DAY. *NM

NHTSA ODI #10141241

72,000 miles · Oct 23, 2005
Visibility

VEHICLE IS 2001 DIAMANTE LS WITH 72,000 VIN # [XXX]. DEFROSTER NOT WORKING PROPERLY WINDOW FOG SMELL OF ANTIFREEZE AND PUDDLE OF ANTIFREEZE UNDER PASSENGER RUG. HAVE ESTIMATE OF $800 TO FIX. *NM UPDATED 07/18/2012 *JS INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI #10140531

42,853 miles · Oct 20, 2005
Visibility

I HAVE A 2001 MITSUBISHI DIAMANTE LS THAT REQUIRES I REPLACE THE HEATER CORE, THIS HAS BEEN A PROBLEM SINCE I PURCHASED THIS VEHICLE. I ALSO OWNED A 1998 DIAMANTE LS WITH THE SAME PROBLEM. *JB

NHTSA ODI #10140320

Official recalls

2

04V428000 · Equipment:other:labels

Sep 1, 2004

CERTAIN PASSENGER VEHICLES FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 208, 'OCCUPANT CRASH PROTECTION.' THE BILINGUAL ENGLISH/SPANISH REMOVABLE AIR BAG WARNING LABELS AFFIXED TO THE DASH AND TO THE SUNVISOR DO NOT MEET THE SIZE REQUIREMENTS OF THE STANDARD.

Consequence & remedy

Consequence: THIS DOES NOT MEET THE REQUIREMENTS OF THE STANDARD.

Remedy: MITSUBISHI CARIBBEAN WILL MAIL A CUSTOMER NOTIFICATION LETTER CONTAINING A WRITTEN DESCRIPTION AND A GRAPHIC OF THE BI-LINGUAL DASHBOARD AIR BAG WARNING LABEL. IN ADDITION, ALL CURRENT 2000-2004 NATIVA OWNERS WILL ALSO RECEIVE REPLACEMENT AIR BAG ALERT LABELS FOR THE SUN VISORS. THIS RECALL IS EXPECTED TO BEGIN DURING MARCH OR APRIL 2005. THE NOTIFICATION TO THE NATIVA OWNERS IS EXPECTED TO BEGIN DURING APRIL OR MAY 2005. OWNERS SHOULD CONTACT MITSUBISHI CARIBBEAN AT 1-787-251-8715.

04V067000 · Equipment:other:owners/service/other Manual

Feb 11, 2004

CERTAIN SPORT UTILITY AND PASSENGER VEHICLES FAIL TO COMPLY WITH FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 225, "CHILD RESTRAINT ANCHORAGE SYSTEMS." THE OWNER'S MANUAL DOES NOT CONTAIN A STEP-BY-STEP DESCRIPTION FOR HEADREST ADJUSTMENT WHEN INSTALLING A CHILD RESTRAINT SYSTEM (CRS) TETHER STRAP.

Consequence & remedy

Consequence: IF THE TETHER STRAP IS IMPROPERLY INSTALLED TO THE TETHER ANCHOR, THE CHILD SAFETY SEAT MAY NOT BE SUFFICIENT RESTRAINED. IN THE EVENT OF A CRASH, THE CHILD COULD BE INJURED.

Remedy: A LETTER OUTLINING THE PROBLEM WILL BE SENT TO OWNERS ALONG WITH A STICKER CONTAINING THE CORRECT INSTRUCTIONS AS WELL AS INSTRUCTIONS ON WHERE TO AFFIX THE STICKER IN THE OWNER'S MANUAL. THE RECALL BEGAN ON MARCH 29, 2004. OWNERS SHOULD CONTACT MITSUBISHI AT 1-888-648-7820.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

0

No exact-year investigations in this snapshot.