Mitsubishi Diamante Problems by Model Year
NHTSA recorded 502 consumer complaints across the 11 model years of the Mitsubishi Diamante (1992–2003) that have at least 5 complaints. 2002 has the most, with 123. Across all years, the part named most often is visibility (217 mentions). Pick a model year below to see its parts, mileage, recalls and service bulletins.
Best and worst Diamante years →
All Diamante model years
Years with fewer than 5 complaints are not listed. The score compares years of the same model, allowing for the era and for how long each year has collected complaints: 50 is a typical year, lower means fewer complaints. It is not adjusted for sales volume.
| Year | Complaints | Median mi | Recalls | TSBs | Score (50 = typical) | Trend |
|---|---|---|---|---|---|---|
| 2003 | 56 | 57,500 | 2 | 22 | Not compared (before 2008) | Stable |
| 2002 | 123 | 60,000 | 3 | 25 | Not compared (before 2008) | Stable |
| 2001 | 78 | 59,750 | 2 | 26 | Not compared (before 2008) | Stable |
| 2000 | 51 | 57,171 | 3 | 22 | Not compared (before 2008) | Stable |
| 1999 | 23 | 86,450 | 2 | 16 | — | Stable |
| 1998 | 27 | 71,750 | 1 | 16 | Not compared (before 2008) | Stable |
| 1997 | 34 | 111,566 | 0 | 16 | Not compared (before 2008) | Stable |
| 1995 | 12 | 137,500 | 0 | 14 | — | Not enough data |
| 1994 | 27 | 50,015 | 2 | 5 | Not compared (before 2008) | Stable |
| 1993 | 29 | 108 | 3 | 4 | Not compared (before 2008) | Stable |
| 1992 | 42 | 120,000 | 2 | 4 | Not compared (before 2008) | Stable |
Parts named most often, all years
Counts add up complaint mentions across the listed years. A complaint can name several parts.
- Visibility (wipers, defrost, mirrors)217 42%
- Engine cooling102 20%
- Brakes61 12%
- Transmission and drivetrain50 9.6%
- Air bags30 5.8%
- Electrical system24 4.6%
- Suspension19 3.6%
- Tires18 3.5%
Example complaints
One per model year, chosen for length and detail. Personal details are removed. They are consumer reports, not findings.
1998: “The heater core has failed (once again) I am not sure of any company that has realeased their cars with such a major failure without taking some kind of responsibility to recall this item in the car. Nearly all of the heater cores from Mitsubishi diamantes that I have seen are all bad. Leaks onto the ecu and causes a whole heck load of problems. Please DOT have Mitsubishi recall this. …”
NHTSA complaint #10715681, filed 2015-05, 171,000 miles2002: “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 us and by doing so they put our lives in danger.the drivers side air bag was also missing when we purchased the car.”
NHTSA complaint #11012456, filed 2017-08, 143,000 miles2003: “I purchased a used 2003 Mitsubishi Diamante from bankston dodge in 2007. It was clean and ran well. There was an unusual odor inside, but smelled as if it could have been what the dealership used to clean the inside. It turned out to be anti-freeze. The vehicle had a heater core leak prior to our purchase. Recently the gas gauge has stopped working.”
NHTSA complaint #10276190, filed 2009-07, 50,000 milesOther Mitsubishi models
2,131 complaintsMitsubishi Galant
1,781 complaintsMitsubishi Outlander
1,323 complaintsMitsubishi Lancer
861 complaintsMitsubishi Montero
770 complaintsMitsubishi Mirage
689 complaintsMitsubishi Outlander Sport
473 complaintsMitsubishi 3000GT
459 complaints
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. Methodology