Complaints by model year
| Year | Complaints | vs. typical* | Recalls | Top problem | Verdict |
|---|---|---|---|---|---|
| 2003 | 56 | 1.8× | 2 | AC & Heater | Caution |
| 2002 | 123 | 3.7× | 3 | AC & Heater | Avoid |
| 2001 | 78 | 2.5× | 2 | AC & Heater | Avoid |
| 2000 | 51 | 1.6× | 3 | AC & Heater | Caution |
| 1999 | 23 | −61% | 2 | AC & Heater | Good |
| 1998 | 27 | −53% | 1 | AC & Heater | Good |
| 1997 | 34 | −37% | — | Brake | Average |
| 1995 | 12 | −75% | — | Transmission | Good |
* Complaints compared with the median Diamante year at the same age, so new and old years are judged fairly. How this works.
Most common Mitsubishi Diamante problems
Latest Mitsubishi Diamante recalls
Equipment › Other › Labels
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.
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.
Equipment › Other › Owners/service/other manual
Certain sport utility and passenger vehicles fail to comply with federal motor vehicle safety standard no. 225, "child restraint anchorage systems." the owner's manual does not contain a step-by-step description for headrest adjustment when installing a child restraint system (crs) tether strap.
Remedy: A letter outlining the problem will be sent to owners along with a sticker containing the correct instructions as well as instructions on where to affix the sticker in the owner's manual.
Electrical system › Wiring › Front underhood
On certain passenger vehicles, the main under hood electrical wiring harness May have insufficient clearance between the engine control harness and the exhaust heat shield. As a result, the harness could come in contact with the heat shield, which could result in melting of the harness insulation.
Remedy: Dealers will inspect the harness for damage and, if none is evident, will tie the harness back to prevent the harness from ever coming into contact with the heat shield.
Parking brake › Driveline › Hydraulic
Vehicle description: passenger vehicles. The head of the screw that holds the retaining clip for the parking brake shoe can become brittle and break off.
Remedy: Dealers will replace the retaining clip screw and in the process inspect the rear brake system of any possible related damage. Any related damage that May be found will also be repaired.
Frequently asked questions
What years of the Mitsubishi Diamante should you avoid?
2002, 2001, 2003 and 2000 — these years have the most complaints relative to other Diamante years at the same age, led by a/c & heater problems in the 2002.
What is the best year for the Mitsubishi Diamante?
1995 has the fewest complaints compared with other Diamante years at the same age, followed by 1999 and 1998. Newer years can look better simply because fewer complaints have come in yet, so we compare like with like.
What are the most common Mitsubishi Diamante problems?
Across all years, owners report the most problems with the a/c & heater (199), engine & cooling (86) and brakes (39). AC & Heater complaints peak in the 2002 model year.
How many recalls has the Mitsubishi Diamante had?
4 recalls across 1995–2003. The model year with the most is 2000. See all Mitsubishi Diamante recalls by year.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.