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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.

About this comparison →

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

Tap a category to read its complaints. One report may name several components.

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
Mileage unknown · Oct 22, 2007
Engine And Engine Cooling

MY CAR IS MAKING ME SICK!! I NOTICED A SMELL OF ANTI-FREEZE COMING OUT OF THE CLIMATE CONTROL VENTS. UPON FURTHER INVESTIGATION, I NOTICED ANTI-FREEZE/ENGINE COOLANT LEAKING FROM THE HEATER CORE DOWN ONTO FLOOR MATS, CLIMATE CONTROL INTAKE, ELECTRICAL WIRING INSIDE DASHBOARD, AND MORE IMPORTANTLY AUTOMATIC TRANSMISSION COMPUTER…

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MY CAR IS MAKING ME SICK!! I NOTICED A SMELL OF ANTI-FREEZE COMING OUT OF THE CLIMATE CONTROL VENTS. UPON FURTHER INVESTIGATION, I NOTICED ANTI-FREEZE/ENGINE COOLANT LEAKING FROM THE HEATER CORE DOWN ONTO FLOOR MATS, CLIMATE CONTROL INTAKE, ELECTRICAL WIRING INSIDE DASHBOARD, AND MORE IMPORTANTLY AUTOMATIC TRANSMISSION COMPUTER. THIS IS A SIGNIFICANT SAFETY AND HEALTH ISSUE AND NEEDS TO BE ADDRESSED IMMEDIATELY. WHERE IS MANUFACTURER'S RECALL. *JB

NHTSA ODI #10206486

84,560 miles · Aug 20, 2007
Visibility

2001 MITSUBISHI DIAMANTE - HAVE ANTIFREEZE ODOR COMING FROM AC VENTS. AFTER MUCH RESEARCH I FIND THAT THIS IS A RECURRING PROBLEM WITH SECOND GENERATION DIAMANTES (1997-2004) WITH THE 2001 YEAR MODEL BEING THE MOST EFFECTED. THE ODORS HAVE EVEN CAUSED RESPIRATORY PROBLEMS. I MYSELF HAVE EXPERIENCED SEVERE HEADACHES AND SLEEPINES…

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2001 MITSUBISHI DIAMANTE - HAVE ANTIFREEZE ODOR COMING FROM AC VENTS. AFTER MUCH RESEARCH I FIND THAT THIS IS A RECURRING PROBLEM WITH SECOND GENERATION DIAMANTES (1997-2004) WITH THE 2001 YEAR MODEL BEING THE MOST EFFECTED. THE ODORS HAVE EVEN CAUSED RESPIRATORY PROBLEMS. I MYSELF HAVE EXPERIENCED SEVERE HEADACHES AND SLEEPINESS DUE TO THIS PROBLEM. THE ODOR AT FIRST WAS VERY FAINT BUT BECAME WORSE OVER TIME. WITH AS MANY PROBLEMS THAT HAS OCCURRED AND THE HEALTH IMPLICATIONS RELATED TO THIS OBVIOUS DEFECT, THIS PROBLEM SHOULD BE A MANUFACTURERS RECALL TO RESOLVE THIS POTENTIALLY DANGEROUS AND HEALTH HAZARDOUS ISSUE. *TR

NHTSA ODI #10200085

101,890 miles · Jul 25, 2007
SuspensionTires

I AM FEELING A CONSTANT VIBRATION ON THE FRONT END OF CAR, AND I JUST REPLACED THE FRONT TIRES. I CHECKED TO SEE IF THE WEIGHTS ARE STILL ON THE RIM AND THEY ARE. ALL OF A SUDDEN I STARTED TO HEAR A VERY LOUD NOISE AND WHEN I PUSHED THE GAS PEDAL THE VIBRATION WOULD GET WORSE. *TR

NHTSA ODI #10197467

54,000 miles · May 19, 2007
Engine And Engine Cooling

SINCE I BOUGHT THE USED CAR IN 2003 I FOUND THE CAR SMELLED SWEET, ANTIFREEZE COOLANT INSIDE, BUT I THOUGHT IT WAS NORMAL FOR THE CAR. *AK BUT IN FEB, THE BURNING ODOR BECAME STRONGER ESPECIALLY WHEN I TURN ON THE HEATER. NOW, THE FRONT INTERIOR WINDOWS BECOME FOGS UP RIGHT AWAY WHENEVER I TURN ON THE HEATER OR JUST DRIVI…

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SINCE I BOUGHT THE USED CAR IN 2003 I FOUND THE CAR SMELLED SWEET, ANTIFREEZE COOLANT INSIDE, BUT I THOUGHT IT WAS NORMAL FOR THE CAR. *AK BUT IN FEB, THE BURNING ODOR BECAME STRONGER ESPECIALLY WHEN I TURN ON THE HEATER. NOW, THE FRONT INTERIOR WINDOWS BECOME FOGS UP RIGHT AWAY WHENEVER I TURN ON THE HEATER OR JUST DRIVING. THE ODOR IS GETTING ME SICK, AND THE WINDSHIELD IS SO FOGGED THAT I NEED TO CONSTANTLY WIPE IT JUST TO SEE OUT. I THINK THIS IS BECOMING UNSAFE TO DIRVE.

NHTSA ODI #10191235

64,000 miles · May 3, 2007
Visibility

I HAVE A 2001 MITSUBISHI DIAMANTE LS WITH 66,000 MILE AND MY HEATER CORE WENT OUT. I NOTICED MY WINDOW WOULD FOG UP AND YOU CAN SMELL ANTIFREEZE IN THE CAR, TO HAVE THIS REPLACED IS GOING TO COST ME ALMOST $998.00 FOR PART AND LABOR. MOST MECHANICS I HAVE TALKED TO ABOUT THIS PROBLEM SAID THAT I SHOULDN'T BE HAVING THIS PROBLEM …

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I HAVE A 2001 MITSUBISHI DIAMANTE LS WITH 66,000 MILE AND MY HEATER CORE WENT OUT. I NOTICED MY WINDOW WOULD FOG UP AND YOU CAN SMELL ANTIFREEZE IN THE CAR, TO HAVE THIS REPLACED IS GOING TO COST ME ALMOST $998.00 FOR PART AND LABOR. MOST MECHANICS I HAVE TALKED TO ABOUT THIS PROBLEM SAID THAT I SHOULDN'T BE HAVING THIS PROBLEM WITH THE HEATER CORE SO EARLY. I KNOW OF NUMEROUS COMPLAINTS OF THIS DEFECT FOR THIS (NONE OF WHICH I KNEW ABOUT BEFORE I BOUGHT THE CAR) I KNOW THAT IT IS DANGEROUS FOR THE ANTIFREEZE TO BE INHALED, AND WITH ALL THE COMPLAINTS ABOUT THIS OBVIOUS DEFECT SOMETHING SHOULD BE DONE ABOUT IT. THERE IS HEALTH RISKS WITH THE HEATER CORE GOING OUT AND RELEASING THE ANTIFREEZE NOT TO MENTION THE SAFETY CONCERNS WITH THE HEATER CORE BEING SO NEAR IMPORTANT COMPUTER COMPONENTS. *TR

NHTSA ODI #10189662

58,100 miles · Apr 26, 2007
Engine And Engine CoolingVisibility

FOR NO PARTICULAR REASON MY CAR FILLS UP WITH THE SMELL OF ANTI-FREEZE COOLANT WHEN I TURN ON THE HEATER. I HAVE READ THAT THIS IS CAUSED BY LEAKING 0-RINGS AND THAT THIS WILL DAMAGE THE COMPUTERS WHICH ARE UNDERNEATH THE LEAK. THE CAR IS A 2001 MITSUBISHI DIAMANTE L.S. THE DEALER SAYS IT IS NOT A COMMON ISSUE. GOOGLE SAYS OTHE…

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FOR NO PARTICULAR REASON MY CAR FILLS UP WITH THE SMELL OF ANTI-FREEZE COOLANT WHEN I TURN ON THE HEATER. I HAVE READ THAT THIS IS CAUSED BY LEAKING 0-RINGS AND THAT THIS WILL DAMAGE THE COMPUTERS WHICH ARE UNDERNEATH THE LEAK. THE CAR IS A 2001 MITSUBISHI DIAMANTE L.S. THE DEALER SAYS IT IS NOT A COMMON ISSUE. GOOGLE SAYS OTHERWISE. *TR

NHTSA ODI #10188952

50,000 miles · Apr 22, 2007
Visibility

MY WINDSHIELD WAS FOGGING UP CREATING A SAFETY HAZARD. I HAD TO REPLACE THE HEATER CORE. COST WAS APPROXIMATELY $500. *TR

NHTSA ODI #10188549

80,800 miles · Apr 7, 2007
Visibility

WHEN USING THE DEFROSTER THE WINDOWS INCREASINGLY FOG UP AND IT DOES NOT CLEAR. FROM INVESTIGATING I HAVE COME TO FIND OUT THAT THIS ISSUE APPEARS TO BE CAUSED BY A DOCUMENTED PROBLEM WITH THE HEATER CORE OF THIS MODEL OF OF VEHICLE, 2001 MITSUBISHI DIAMANTE, IN THIS CASE. I PURCHASED THE VEHICLE USED FROM A LOCAL DEALER APP…

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WHEN USING THE DEFROSTER THE WINDOWS INCREASINGLY FOG UP AND IT DOES NOT CLEAR. FROM INVESTIGATING I HAVE COME TO FIND OUT THAT THIS ISSUE APPEARS TO BE CAUSED BY A DOCUMENTED PROBLEM WITH THE HEATER CORE OF THIS MODEL OF OF VEHICLE, 2001 MITSUBISHI DIAMANTE, IN THIS CASE. I PURCHASED THE VEHICLE USED FROM A LOCAL DEALER APPROXIMATELY TWO WEEKS AGO. I GUESS LUCKY FOR US THE WEATHER TURNED COLD, FORCING US TO USE THE DEFROSTER, AND THEREBY DISCOVERING THIS PROBLEM. I REALIZE I MOST LIKELY DO NOT HAVE ANY RECOURSE IN MY CASE I WANT TO FILE THIS ON BEHALF OF THOSE WHO MIGHT SINCE, AS STATED ABOVE, THIS IS A KNOWN ISSUE WITH THE DIAMANTE.*AK

NHTSA ODI #10187242

99,000 miles · Mar 16, 2007
Seat Belts

SEAT BELT ON DRIVERS SIDE OF OF 2001 MITSUBISHI, DIAMANTE HAS RETRACTED BACK INTO THE SIDE COLUMN RETRACTOR MECHENISM AND WILL NOT RELEASE BACK OUT. TOOK VEHICLE TO A LOCAL SERVICE REPAIR SHOP AND THEY DID NOT HAVE AN ANSWER. THE RETRACTOR IS A SEALED UNIT FROM THE MFG. AND CAN'T BE OPENED. IT APPEARS THAT THE RETRACTOR IS RI…

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SEAT BELT ON DRIVERS SIDE OF OF 2001 MITSUBISHI, DIAMANTE HAS RETRACTED BACK INTO THE SIDE COLUMN RETRACTOR MECHENISM AND WILL NOT RELEASE BACK OUT. TOOK VEHICLE TO A LOCAL SERVICE REPAIR SHOP AND THEY DID NOT HAVE AN ANSWER. THE RETRACTOR IS A SEALED UNIT FROM THE MFG. AND CAN'T BE OPENED. IT APPEARS THAT THE RETRACTOR IS RIVITED TO THE VEHICLE FRAME. CALLED THE MITSUBISHI DEALER AND ASKED IF THERE IS A WAY TO RELEASE THE BELT AND IF THERE IS A RECALL. THEIR ANSWER WAS NO AND THEY NEEDEED TO LOOK AT THE CAR. I WAS TOLD IT IS NOT UNDER WARRANTY EVEN THOUGH IT IS A SAFETY ISSUE. I DON'T KNOW WHERE TO HAVE THIS REPAIRED OR REPLACED.

NHTSA ODI #10185300

Mileage unknown · Feb 2, 2007
Visibility

DEFROSTER WOULD NOT DEFROST THE WINDOWS. THE TRANSMISSION KEEPS GOING IN AND OUT OF GEAR. WAS TOLD THE HEATER CORE HAS GONE BAD, WHICH THE TRANSMISSION WAS GOING IN AND OUT BECAUSE COOLANT WAS DRIPPING ON THE RELAY THAT WAS UNDERNEATH IT. IT IS GOING TO COST $500 DOLLARS FOR THE RELAY, THE RESET OF THE CHECK ENGINE AND HEATER C…

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DEFROSTER WOULD NOT DEFROST THE WINDOWS. THE TRANSMISSION KEEPS GOING IN AND OUT OF GEAR. WAS TOLD THE HEATER CORE HAS GONE BAD, WHICH THE TRANSMISSION WAS GOING IN AND OUT BECAUSE COOLANT WAS DRIPPING ON THE RELAY THAT WAS UNDERNEATH IT. IT IS GOING TO COST $500 DOLLARS FOR THE RELAY, THE RESET OF THE CHECK ENGINE AND HEATER CORE. THEN A ADDITIONAL $600 DOLLARS FOR LABOR SINCE THEY HAVE TO REMOVE THE ENTIRE DASHBOARD. *JB

NHTSA ODI #10181448

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.