2003 Mitsubishi Diamante Electrical system Problems
- Complaints
- 2about this part
- Share
- 4%of 56 total for the year
- Median mileage
- 40,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the electrical system of the 2003 Mitsubishi Diamante, 4% of the 56 complaints for this model year. Where a mileage was given, the median is 40,000 miles.
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.
“Car doors are locking by themselves, the alarm for keys being left in the ignition no longer sounds, the automatic unlock when keys left in the ignition no longer works, and the headlights do not turn off when the car is turned off and door opened. Have been stranded several times due to keys locked in the car, and a dead battery due to headlights being left on.”
NHTSA complaint #10117995, filed 2005-04, 40,000 miles“Various intermittent failures to include, car locking on its own, headlights not going out when car is turned off, car not dinging when keys left in ignition, and window fuse being blown when windows are not being raised or lowered. Have taken car to dealer and an electrical specialist. Both have said they can't fix it since the problem is intermittent.”
NHTSA complaint #10182516, filed 2007-02Related 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.
Electrical system: other model years
Other parts of the 2003 Mitsubishi Diamante
28 complaintsEngine cooling
17 complaintsBrakes
5 complaintsTransmission and drivetrain
4 complaintsEquipment
3 complaintsSuspension
3 complaintsTires
3 complaintsFuel system
2 complaintsAir bags
1 complaintsExterior lighting
1 complaintsLatches, locks and linkages
1 complaintsSeats
1 complaints
← All problems reported for the 2003 Mitsubishi Diamante
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 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