2002 Mitsubishi Diamante Electrical system Problems
- Complaints
- 9about this part
- Share
- 7%of 123 total for the year
- Median mileage
- 50,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 9 complaints about the electrical system of the 2002 Mitsubishi Diamante, 7% of the 123 complaints for this model year. Where a mileage was given, the median is 50,000 miles. 1 of these say a crash was involved, according to the filers. 1 recall campaign on record is filed under a similar system.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I have a '02 Mitsubishi Diamante and I have had problems out of the heater core leaking and now its affected my ecu (computer) I call the dealership and they want outrageous prices to fix or even check my car.. I think that since its a problem from the dealer they should recall these cars.. I know I will never buy another Mitsubishi and I will never recommend them to a friend.. What can be done about this problem?”
NHTSA complaint #10290728, filed 2009-11, 94,000 miles“I own a 2002 Mitsubishi Diamante car, I bought this car in 02 since the 1st day I bought the car there was problems. The computer in the car went crazy my check engine light,,cruise control,anti lock brake, tcl light all started flashing . I took the car back to the dealer & they replaced the computer but it didn't work they put 3 computers in since then, these lights are still on till this day. In 06 my trans blew I took the car back to the dealer they replaced my trans the car still doesn't ride right. My A/C turns on but nothing comes out sometimes. …”
NHTSA complaint #10236534, filed 2008-07, 20 miles“While driving at any speed electrical system failed. As a result, the vehicle stalled in oncoming traffic. It was later determined by the dealer's technician that the etacs systems failed.”
NHTSA complaint #10072280, filed 2004-07, 21,076 miles“Headlights turn off for a split second while driving down the highway. It does this when the AC system kicks in. Lights on the inside of the vehicle dim as well. This happens at both idle and high RPM. A volt meter shows a large voltage spike for a short period of time. The voltage regulator is not responding fast enough to pick up the voltage. Have worked for over a year with Mitsubishi to attempt to get this resolved. Their mechanics at 2 dealerships say that the problem isn't normal until they don't figure out the problem. Then they come back and say it's normal. …”
NHTSA complaint #10064425, filed 2004-04, 1 miles“There should be a recall, own a 2002 Mitsubishi Diamante. I just found out that the anti-freeze smell and the smoke coming through the vents is because the heater core has gone bad. The quote I received was for $1100. My antenna just stopped working on me also. It doesn't go down anymore, but the motor still sounds like its working. We are all having too many of the same problems. The company should be liable.”
NHTSA complaint #10261387, filed 2009-03Related recalls
- 02V100001Apr 7, 2002On certain passenger vehicles, the main under hood electrical wiring harness may have insufficient clearance between the engine control harness and the…Covers: Mitsubishi Diamante 2002
Related service bulletins
- 10170096Mar 5, 2013This is a service newsletter (Tech Talk) that was sent out to dealers.
- 10170100Feb 6, 2013This is a service newsletter (Tech Talk) that was sent out to dealers.
- 10170087Dec 7, 2012This is a service newsletter (Tech Talk) that was sent out to dealers.
- 10013765Oct 1, 2004Pcm reflash for dtc p0133.
- 10013670Aug 1, 2004Power train control module (pcm) reflash for diagnositc trouble code (dtc) p0133. Mitsubishi tech talk.
Electrical system: other model years
Other parts of the 2002 Mitsubishi Diamante
71 complaintsEngine cooling
38 complaintsTransmission and drivetrain
10 complaintsBrakes
5 complaintsFuel system
4 complaintsBody and structure
3 complaintsTires
3 complaintsAir bags
2 complaintsEquipment
2 complaintsOther or unknown
2 complaintsSuspension
2 complaintsWheels
2 complaints
← All problems reported for the 2002 Mitsubishi Diamante
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology