2002 Mitsubishi Diamante problems, complaints & recalls
Most-reported problem areas: Visibility:defroster/Defogger/Hvac System:heater Core (62) · Engine And Engine Cooling:cooling System (13) · Engine And Engine Cooling (9)
🧭 Reliability snapshot
Compared against other Mitsubishi Diamante model years — complaint volume vs the model's median year, recalls and severity. How we score →
🛣️ Complaints by mileage
92 NHTSA complaints that reported an odometer reading.
Safety recalls (0)
No recalls on record for this model year (campaigns announced since 2010).
Service bulletins (59)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Equipment:other:owners/Service/Other Manual 2023-07-21 · DEALER LETTER · Service Bulletin/Repair Instructions
this is a dealer letter sent to dealers informing that mitsubishi technical training has launched the 3rd quarterly technician quiz for 2023.
Structure 2023-04-24 · TSB-23-00-004 · Service Bulletin/Repair Instructions
this technical service bulletin provides instructions and material safety data sheets for removal of rap-film adhesive residue.
Equipment:other:owners/Service/Other Manual 2023-04-24 · TSB-23-00-001 · Service Bulletin/Repair Instructions
this technical service bulletin reviews the regulations that require a label showing the reduction in load carrying capacity be affixed to vehicles when the total net weight of accessories is more than 1.5 percent of the vehicle's gross vehicle weight rating (gvwr) or 100 lbs.
Equipment:other:owners/Service/Other Manual 2023-04-21 · DEALER LETTER · Service Bulletin/Repair Instructions
this is a dealer letter sent to dealers informing that mitsubishi technical training has launched the 2nd quarterly technician quiz for 2023.
Unknown Or Other 2022-04-07 · TSB-22-54-003 · Service Bulletin/Repair Instructions
this technical service bulletin was sent to dealers to explain the difference between normal dew condensation, which is a natural phenomenon, and water penetration caused by improper sealing or a defective/broken part.
Equipment 2019-11-26 · TT253 · Service Bulletin/Repair Instructions
this is a service newsletter (tech talk) that was sent out to dealers.
Showing the 6 most recent of 59 bulletins. Search all of them free at nhtsa.gov.
What owners report
2017-08-02 · Unknown Or Other · 143,000 mi“i was driving my mitsubishi across the university bridge on 7-28-2017 and suddenly the transmission went out and i was stuck and had no power of movement,my wife and 3 y.o.child were passengers in the car,luckily the state patrol came and assisted us.the dealer told us that this car was mechanically sound and had no problems or issues.they lied to …”
2015-04-08 · Power Train“my wife was driving on the interstate when the transmission failed and would no longer propel the vehicle. i have researched the problem and multiple people have had the same problem. i don't understand why no recall has been made. this is a very hazardous issue, especially if you are traveling on an interstate. she had to coast the car over and wa…”
2015-02-18 · Electrical System · 65,289 mi“tl* the contact owns a 2002 mitsubishi diamante. while driving at 45 mph, the vehicle stalled without warning. the vehicle was taken to the dealer for diagnostic testing. the dealer was unable to diagnose the cause of the failure and stated that the vin was not included in nhtsa campaign number: 02v100001 (electrical system.) the manufacturer was m…”
2015-01-11 · Power Train · 141,000 mi“driving along at 35mph engine rpm suddenly almost red lined lost power and lost all forward and reverse gears.had to tow the vehicle! *tr…”
2013-07-24 · Power Train · 60,000 mi“the car just stopped. the gears were nonfunctional. *tr…”
2012-10-01 · Service Brakes · 140,000 mi · 💥 crash“tl* the contact owns a 2002 mitsubishi diamante. the contact stated that while driving at 75 mph, the contact attempted to brake but the brakes failed to respond without any warnings. the vehicle crashed into a passenger van. the vehicle was destroyed. the contact mentioned that two months prior to the failure the check engine light had illuminated…”
2010-12-06 · Visibility:defroster/Defogger/Hvac System · 91,000 mi“the heater core is an extremely dangerous problem. the windows in the car fog up so bad i couldnt drive the car...had to pull over and wipe the windows down. but the thing is...i didnt know what the problems was...until i realized the windows werent just being fogged by the cold, ect it was a toxic mist from a heater core problem...i pulled over 2 …”
2010-08-25 · Air Bags · 88,000 mi · 💥 crash“tl* the contact owns a 2002 mitsubishi diamante. the contact stated that she was involved in a frontal crash while driving approximately 35 mph. the contact was injured as a result and a police report was filed. none of the air bags deployed upon impact. the vehicle was destroyed. the manufacturer was not contacted. the vin was not available. the c…”
2010-06-24 · Engine And Engine Cooling · 80,000 mi“just like everyone else with a 2002 mitsubishi diamante, i have had heater core problems. antifreeze leaking/smell and windows fogging up. cost to repair exceeds $1000. if every one of these vehicles has this same issue, why has it never been recalled? and why does mitsubishi get away with all cars having this defect? and why has this investig…”
2010-05-06 · Engine And Engine Cooling:cooling System“mitsubishi diamante 2002 has faulty o-rings and is widely publicized to cause major heater core problems and anti-freeze leakage. *tr…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.