Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
Limited mileage data: 13 of 27 reports include usable mileage. There isn’t enough coverage to show a useful chart.
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 15 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Service Brakes, Hydraulic. Review the 3 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Vehicle Speed Control. Review the 3 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
1 crash reports0 fire reports2 injury reports
What owners actually said
27 reports
56,231 miles · Oct 31, 2004
Visibility
1998 MITSUBISHI DIAMANTE. COOLANT LEAK FROM HEATER CORE O RING FAILURE. COOLANT LEAKING INTO PASSENGER COMPARTMENT CAUSING EYE AND THROAT IRRITATION, FOGGING OF WINDOWS CAUSING POOR VISIBILITY. LEAKING ONTO KEY CAR ELECTRONICS WHICH COULD CAUSE OTHER CAR COMPONENTS TO FAIL WITHOUT WARNING. HEATER CORE O RING WAS REPLACED AT…
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1998 MITSUBISHI DIAMANTE. COOLANT LEAK FROM HEATER CORE O RING FAILURE. COOLANT LEAKING INTO PASSENGER COMPARTMENT CAUSING EYE AND THROAT IRRITATION, FOGGING OF WINDOWS CAUSING POOR VISIBILITY. LEAKING ONTO KEY CAR ELECTRONICS WHICH COULD CAUSE OTHER CAR COMPONENTS TO FAIL WITHOUT WARNING. HEATER CORE O RING WAS REPLACED AT 55,000 MILES AT A COST OF $560.00. NOW AT 106,000MILES LEAKING HAS STARTED AGAIN AND MITSUBISHI WANTS $650.00 TO FIX WITH NO GUARANTEE THAT FIX IS PERMANENT. *JB
NHTSA ODI #10098067
52,300 miles · Sep 30, 2004
Visibility
HEATER CORE PROBLEM. WINDOWS STARTED TO FOG UP AND VERY STRONG SMOKE TYPE ORDER FROM THE VENTS. COMPUTER WAS COVERED WITH BROWN BURNT SUBSTANCE.*AK
NHTSA ODI #10093396
Mileage unknown · Aug 23, 2004
Vehicle Speed ControlCrashInjury
THIS IS THE SECOND TIME SINCE DECEMBER 2003 THAT THE ACCELERATOR STUCK WHILE IN REVERSE AND THE BRAKES FAILED, CAUSING PROPERTY DAMAGE AND INJURIES. THIS IS VERY DANGEROUS AND I THANK GOD THAT NO LITTLE KIDS WERE KILLED!!! THE FIRST TIME IT HAPPENED I CALLED MITSUBISHI AND REPORTED THE PROBLEM AND NEVER GOT A RESPONSE.*AK
NHTSA ODI #10088452
91,000 miles · Jul 20, 2004
Visibility
THIS IS A MITSUBISHI DIAMANTE 1998 ES. I'M EXPERIENCING PUNGENT SMELL OF ANTI-FREEZE INSIDE THE CAR AS SOON AS I TURN ON HEATING. THE DEALER I GOT THE PREOWNED CAR FROM WON'T FIX THE PROBLEM UNLESS I CAN SHOW THEM THE LEAK IN HEATER CORE. ANTI-FREEZE CONTAINS ETHYLENE GLYCON AND THE FUMES ARE HIGHLY TOXIC. FIXING THE THE HEATER …
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THIS IS A MITSUBISHI DIAMANTE 1998 ES. I'M EXPERIENCING PUNGENT SMELL OF ANTI-FREEZE INSIDE THE CAR AS SOON AS I TURN ON HEATING. THE DEALER I GOT THE PREOWNED CAR FROM WON'T FIX THE PROBLEM UNLESS I CAN SHOW THEM THE LEAK IN HEATER CORE. ANTI-FREEZE CONTAINS ETHYLENE GLYCON AND THE FUMES ARE HIGHLY TOXIC. FIXING THE THE HEATER CORE WILL COST $1000. I AM FILING THIS COMPLAINT TO ASCERTAIN THAT THIS IS A VERY VERY COMMON PROBLEM IN MITSUBISHI DIAMANTE AND MITSUBISHI MOTORS SHOULD BE AWARE OF THREE MAIN RISK ASSOCIATED WITH THIS: (1) THE DEFECT EXPOSES CUSTOMERS TO UNUSUAL LEVEL OF TOXIC ETHYLENE GLYCOL WHICH SHOULD NOT EXCEED 10-25 PPM LEVELS (CONSULT MSDS FOR ETHYLENE GLYCOL) (2) THE LEAK CAN AFFECT THE CAR'S MICROPROCESSOR AND POSES A SEVERE HAZARD FOR DRIVERS. (3) FAULTY HEATER CORE MAKES THE VISIBILITY DIFFICULT DUE TO FOGGING OF WIND SHIELD THUS PUTTING THE DRIVER AT GREATER RISK. I WILL EVENTUALLY FIX THE PROBLEM BY SPENDING $1000 AFTER THE SUMMER IF MITSUBISHI REFUSES TO ISSUE A RECALL. RIGHT NOW I AM TRYING SOME RADIATOR ANTI-LEAK TO DELAY THE COSTLY REPAIR. BUT I WANT NHTSA TO BE AWARE OF THE HAZARDS THAT HAS BEEN IGNORED BY THE MANUFACTURER. *LA
NHTSA ODI #10082271
69,500 miles · Oct 1, 2003
Seat Belts
REAR PASSENGER SIDE SHOULDER BELT BUCKLE COULD NOT BE UNLATCHED. THIS CAUSED CHILD TO BE LOCKED IN THE SEAT BELT AND UNABLE TO MOVE. SEAT BELT HAD TO BE CUT NEAR THE WAISTLINE AREA TO FREE THE CHILD. *AK *NLM
NHTSA ODI #10037859
Mileage unknown · Apr 10, 2002
EquipmentSteeringStructure
KUMHO 716 HP4 P215-60-16 94H DOT # 4TL1-YP71-2501 H-RATED TIRES WERE NOT THE CORRECT RATING THAT WAS SUPPOSED TO BE PUT ON VEHICLE. CONTACTED DEALER WHO WAS NOT WILLING TO DO ANYTHING.*AK CONSUMER ALSO STATES THAT CD PLAYER IS INOPERATIVE, NO RADIO CODE STORED, ARMREST COMPARTMENT HOOK LOCK BROKEN, POWER STEERING FLUID ON MINIM…
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KUMHO 716 HP4 P215-60-16 94H DOT # 4TL1-YP71-2501 H-RATED TIRES WERE NOT THE CORRECT RATING THAT WAS SUPPOSED TO BE PUT ON VEHICLE. CONTACTED DEALER WHO WAS NOT WILLING TO DO ANYTHING.*AK CONSUMER ALSO STATES THAT CD PLAYER IS INOPERATIVE, NO RADIO CODE STORED, ARMREST COMPARTMENT HOOK LOCK BROKEN, POWER STEERING FLUID ON MINIMUM LEVEL. *TT
NHTSA ODI #8007265
Mileage unknown · Jul 1, 2001
Service Brakes, Hydraulic
BRAKE PADS PREMATURE WEAR, AND BRAKE ROTORS HAVE WARPED AT LEAST 10 TIMES. *AK
NHTSA ODI #747642
Mileage unknown · May 31, 2001
Service Brakes, Hydraulic
PREMATURE WEAR OF FRONT BRAKE PADS AND ROTORS. DEALER HAS REPLACED PADS AND ROTORS SEVERAL TIMES . *AK
NHTSA ODI #889442
Mileage unknown · May 3, 2001
Visibility
HEATER CORE FAILED, CAUSING ANTI FREEZE TO LEAK INTO PASSENGER'S COMPARTMENT. DEALER HAS BEEN NOTIFIED.*AK THE ANTIFREEZE HAD ALSO STARTED LEAKING ON COMPUTER COMPONENTS UNDER THE CONSOLE. NEW HEATER CORE WAS ON BACK ORDER. *YH
NHTSA ODI #887358
Mileage unknown · Apr 6, 2001
Visibility
HEATER CORE FAILED TO WORK, AND FUMES ENTERED PASSENGER COMPARTMENT.*AK
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.
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.
1998 Mitsubishi Diamante Problems, Complaints & Recalls | Skip That Year
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