MITSUBISHI DIAMANTE · model year

2001 MITSUBISHI DIAMANTE

93 NHTSA complaints, and 2 active recalls for this specific cohort.

NHTSA overall rating

Not crash-tested

New Car Assessment Program

The 2001MITSUBISHIDIAMANTE carries 93 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 0 crashes, 0 fires, 6 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.

Component-level analysis is where model-year complaints become actionable: the top complaint category for the 2001 DIAMANTE is visibility:defroster/defogger/hvac system:heater core with 51 filings, followed by engine and engine cooling:cooling system (6) and engine and engine cooling (5). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability. This model year has 2 active recall campaigns, which means the manufacturer is obligated to remedy the covered defect at no charge for the life of the vehicle — the full NHTSA campaign numbers are listed below.

NHTSA currently has 14 investigation files overlapping the 2001 DIAMANTE. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.

93
Complaints
0
Crashes
0
Fires
6
Injuries
0
Deaths

Total Complaints

93 filings

Crashes Reported

0 reports

Source

NHTSA ODI

Federal complaints database

Complaints vs. fleet median (215)

At or below the fleet median complaint volume.

Complaints by Component

ComponentCount
VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE51
ENGINE AND ENGINE COOLING:COOLING SYSTEM6
ENGINE AND ENGINE COOLING5
TIRES4
VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM4
POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)3
SUSPENSION:FRONT3
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:ROTOR2
VEHICLE SPEED CONTROL:ACCELERATOR PEDAL1
ENGINE AND ENGINE COOLING:ENGINE:GASOLINE1
SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP1
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS1
VISIBILITY:SUN/MOON ROOF ASSEMBLY1
VISIBILITY:GLASS, SIDE/REAR1
VISIBILITY:WINDSHIELD WIPER/WASHER:MOTOR1

Recalls (2)

04V06700011/02/2004

EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

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.

04V42800001/09/2004

EQUIPMENT:OTHER:LABELS

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.

Recent Complaints

20110121TRACTION CONTROL SYSTEM

I HAVE A 2001 MITSUBISHI DIAMANTE, AND AM HAVING PROBLEMS THAT SEEM TO RUN RAMPANT AMONG THIS MODEL/MAKE. MY HEATER CORE WENT OUT AT ABOUT 100K MILES; MY ABS LIGHT STAYS ON (DUE TO A SPEED SENSOR FAIL), WHICH RENDERS THE WHOLE ANTI-LOCK SYSTEM USELESS; AND NOW MY ANTENNA MAST IS BROKEN. ALL OF THESE PROBLEMS ARE PRICEY TO FIX, AND MOST DIAMANTE USERS I HAVE FOUND EXPERIENCE AT LEAST A FEW OF THESE CONFLICTS. ANOTHER PROBLEM I HAVE SEEN MANY COMMENTS ABOUT IS TRANSMISSION FAILURE AT 113K MILES. MY CAR HAS EXACTLY THAT. ON TOP OF EVERYTHING, IT IS WINTER, AND ANTI-LOCK BRAKES ARE MUCH PREFERRED IN ICY WEATHER. I AM STARTING TO SMELL ANTIFREEZE AGAIN, THE WARNING SIGN TO A FAILING HEATER CORE, WHICH CAN LEAK ONTO A TRANSMISSION COMPUTER AND CAUSE IT TO FAIL AS WELL. I AM BEGINNING TO WORRY ABOUT BEING STRANDED, AND EVEN BEING SAFE IN MY CAR. I KNOW I AM NOT THE ONLY ONE COMPLAINING, BECAUSE I HAVE BEEN ONLINE ALL DAY READING FORUMS FROM PEOPLE WITH SIMILAR ISSUES (SEE THE FOLLOWING: HTTP:

Mileage: 100,000

20110121POWER TRAIN:AUTOMATIC TRANSMISSION

I HAVE A 2001 MITSUBISHI DIAMANTE, AND AM HAVING PROBLEMS THAT SEEM TO RUN RAMPANT AMONG THIS MODEL/MAKE. MY HEATER CORE WENT OUT AT ABOUT 100K MILES; MY ABS LIGHT STAYS ON (DUE TO A SPEED SENSOR FAIL), WHICH RENDERS THE WHOLE ANTI-LOCK SYSTEM USELESS; AND NOW MY ANTENNA MAST IS BROKEN. ALL OF THESE PROBLEMS ARE PRICEY TO FIX, AND MOST DIAMANTE USERS I HAVE FOUND EXPERIENCE AT LEAST A FEW OF THESE CONFLICTS. ANOTHER PROBLEM I HAVE SEEN MANY COMMENTS ABOUT IS TRANSMISSION FAILURE AT 113K MILES. MY CAR HAS EXACTLY THAT. ON TOP OF EVERYTHING, IT IS WINTER, AND ANTI-LOCK BRAKES ARE MUCH PREFERRED IN ICY WEATHER. I AM STARTING TO SMELL ANTIFREEZE AGAIN, THE WARNING SIGN TO A FAILING HEATER CORE, WHICH CAN LEAK ONTO A TRANSMISSION COMPUTER AND CAUSE IT TO FAIL AS WELL. I AM BEGINNING TO WORRY ABOUT BEING STRANDED, AND EVEN BEING SAFE IN MY CAR. I KNOW I AM NOT THE ONLY ONE COMPLAINING, BECAUSE I HAVE BEEN ONLINE ALL DAY READING FORUMS FROM PEOPLE WITH SIMILAR ISSUES (SEE THE FOLLOWING: HTTP:

Mileage: 100,000

20110121WHEELS

I HAVE A 2001 MITSUBISHI DIAMANTE, AND AM HAVING PROBLEMS THAT SEEM TO RUN RAMPANT AMONG THIS MODEL/MAKE. MY HEATER CORE WENT OUT AT ABOUT 100K MILES; MY ABS LIGHT STAYS ON (DUE TO A SPEED SENSOR FAIL), WHICH RENDERS THE WHOLE ANTI-LOCK SYSTEM USELESS; AND NOW MY ANTENNA MAST IS BROKEN. ALL OF THESE PROBLEMS ARE PRICEY TO FIX, AND MOST DIAMANTE USERS I HAVE FOUND EXPERIENCE AT LEAST A FEW OF THESE CONFLICTS. ANOTHER PROBLEM I HAVE SEEN MANY COMMENTS ABOUT IS TRANSMISSION FAILURE AT 113K MILES. MY CAR HAS EXACTLY THAT. ON TOP OF EVERYTHING, IT IS WINTER, AND ANTI-LOCK BRAKES ARE MUCH PREFERRED IN ICY WEATHER. I AM STARTING TO SMELL ANTIFREEZE AGAIN, THE WARNING SIGN TO A FAILING HEATER CORE, WHICH CAN LEAK ONTO A TRANSMISSION COMPUTER AND CAUSE IT TO FAIL AS WELL. I AM BEGINNING TO WORRY ABOUT BEING STRANDED, AND EVEN BEING SAFE IN MY CAR. I KNOW I AM NOT THE ONLY ONE COMPLAINING, BECAUSE I HAVE BEEN ONLINE ALL DAY READING FORUMS FROM PEOPLE WITH SIMILAR ISSUES (SEE THE FOLLOWING: HTTP:

Mileage: 100,000

20090409VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE

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

20080813VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE

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

Mileage: 75,000

20080414VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE

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

20080315SUSPENSION:FRONT

2001 MITSUBISHI DIAMANTE. WE HAVE HAD IT ABOUT SIX MONTHS. I HAVE HAD IT IN TO A VERY REPUTABLE SERVICE STATION AND HAVE COME UP EMPTY ON THE FOLLOWING PROBLEM. THE CAR HAS NEW TIRES, THIS OCCURRED BEFORE AND AFTER THEY WERE INSTALLED. DURING MORE AGGRESSIVE TURNING THE CAR GETS VERY UNSTABLE, BAD ENOUGH TO LOSE CONTROL. THE SERVICE SHOP CHECKED OUT ALL THE OBVIOUS FRONT END STUFF ALONG WITH THE THREE BUSHINGS ON EACH FRONT WHEEL ASSEMBLY. FOR THE MOST PART THE CAR TRACKS STRAIGHT DOWN THE ROAD AND IS SMOOTH AND TRUE. IT MAY BE DESCRIBED AS A LITTLE SOFT IN HANDLING BUT NOTHING SEVERE UNTIL THIS SITUATION OCCURS. THE SHOCKS AND STRUTS SEEM OK. THE CAR HAS 70,000 MILES? *TR

Mileage: 63,000

20080314VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE

HEATER CORE WENT BAD AT 105,000 MILES. THIS SEEMS TO BE A MANUFACTORING PROBLEM AND MITSUBIHI SHOULD ADRESS THE ISSUE. *TR

Mileage: 104,000

20080117VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE

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

20071127VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE

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

Mileage: 81,000

20071113VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE

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.

Mileage: 70,000

20071113VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE

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. THE HEATER CORE WAS REPLACED. THE CURRENT AND FAILURE MILEAGES WERE 65,000.

Mileage: 65,000

20071022ENGINE AND ENGINE COOLING:COOLING SYSTEM

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

20070820VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE

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

Mileage: 84,560

20070725SUSPENSION:FRONT

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

Mileage: 101,890

20070725TIRES

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

Mileage: 101,890

20070519ENGINE 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 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.

Mileage: 54,000

20070503VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE

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

Mileage: 64,000

20070426VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE

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

Mileage: 58,100

20070426ENGINE AND ENGINE COOLING

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

Mileage: 58,100

Compare 2001MITSUBISHIDIAMANTE to Similar Vehicles

NHTSA Investigations

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Frequently Asked Questions

How many complaints does the 2001 MITSUBISHI DIAMANTE have?
The 2001 MITSUBISHI DIAMANTE has 93 NHTSA complaints, 0 crashes, 0 fires, 6 injuries, and 0 deaths reported.
Are there any recalls for the 2001 MITSUBISHI DIAMANTE?
Yes, the 2001 MITSUBISHI DIAMANTE has 2 recall(s). The most common affected component is EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Recalls are issued by NHTSA and manufacturers must provide a free remedy.
What are the most common problems with the 2001 MITSUBISHI DIAMANTE?
The most-complained component for the 2001 MITSUBISHI DIAMANTE is VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE with 51 complaints. Other frequently reported areas include ENGINE AND ENGINE COOLING:COOLING SYSTEM and ENGINE AND ENGINE COOLING.
Is the 2001 MITSUBISHI DIAMANTE safe to buy?
Review the complaint history, crash and fire reports, safety ratings, and recall status on this page to make an informed decision. No NHTSA crash test rating is available for this model year. Compare with other model years using the links above.
Where does this data come from?
All complaint, recall, and safety rating data is sourced from the National Highway Traffic Safety Administration (NHTSA). Complaints are filed by vehicle owners through NHTSA's Office of Defects Investigation.

Vehicle Safety Guides

Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.