1997 Mitsubishi Diamante problems & reliability
34 owner complaints filed with NHTSA for the 1997 Mitsubishi Diamante. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
1 complaint report injuries (1 injured).
Federal crash records (FARS 2020–2023): 1997 Mitsubishi Diamante vehicles were involved in 1 fatal crash with 1 occupant death. Involvement counts are not adjusted for how many are on the road and do not imply fault or a vehicle defect.
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Service Brakes, Hydraulic → | 13 | 38% |
| Power Train → | 10 | 29% |
| Engine and Engine Cooling | 4 | 12% |
| Fuel System, Gasoline | 3 | 9% |
| Visibility | 3 | 9% |
| Electrical System | 2 | 6% |
| Parking Brake | 2 | 6% |
| Seat Belts | 2 | 6% |
| Tires | 2 | 6% |
| Vehicle Speed Control | 2 | 6% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
All 14 reported components →Complaints by incident year
What owners report
“Tl*the contact owns a 1997 mitsubishi diamante. The vehicle has cooper lifeliner classic ii tires, size 115/60/15. While driving approximately 70 mph, the rear driver's side tire spontaneously blew out. The contact lost control of the vehicle and crashed. The vehicle was completely destroyed and a police report was…”
Tires · filed Jul 7, 2008
“Tl*the contact owns a 1997 mitsubishi diamante. The contact stated that the radiator leaked due to the heater core. The radiator leaked onto the carpet when the heat was activated. The contact stated that he and his family have inhaled toxic fumes from the radiator leaking onto the carpet and they are concerned of…”
Visibility · filed Feb 11, 2008
“There is a major problem with the mitsubishi diamante heater core going out. Mine went out a few days ago and was informed by mitsubishi it will cost me 965 to replace. Even though there are hundreds of mitsubishi diamante owners complaining about this problem including with people that have as low as 30-45k on their…”
Engine and Engine Cooling · filed Jan 21, 2008
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Technical service bulletins
56 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 1997 Mitsubishi Diamante. The 10 most recent:
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.
TSB-22-54-003 · Service Bulletin/Repair Instructions · issued Apr 7, 2022
This is a service newsletter (Tech Talk) that was sent out to dealers.
TT253 · Service Bulletin/Repair Instructions · issued Nov 26, 2019
This is a Technical Service Bulletin sent to dealers. This bulletin supersedes TSB-18-00-003, issued April, 2018, to add updated information for Carrying Capacity Reduced Label.
TSB-19-00-008 · Service Bulletin/Repair Instructions · issued Jul 30, 2019
This is a service newsletter (Tech Talk) that was sent out to dealers.
TT237 · Service Bulletin/Repair Instructions · issued Feb 26, 2018
This is a service newsletter (Tech Talk) that was sent out to dealers.
TT218 · Service Bulletin/Repair Instructions · issued Aug 28, 2015
This TSB contains troubleshooting steps for diagnosis of various customer complaints relating to the audio system speakers in Mitsubishi vehicles equipped with original equipment audio components.
TSB-15-54-004 · Service Bulletin/Repair Instructions · issued Jul 29, 2015
This is a service newsletter (Tech Talk) that was sent out to dealers.
TT217 · Service Bulletin/Repair Instructions · issued Jul 22, 2015
This is an index of Tech Talk newsletter articles released in 2012.
TTIndex12 · Service Bulletin/Repair Instructions · issued Mar 5, 2013
This is a service newsletter (Tech Talk) that was sent out to dealers.
TT195 · Service Bulletin/Repair Instructions · issued Mar 5, 2013
This is a service newsletter (Tech Talk) that was sent out to dealers.
TT194 · Service Bulletin/Repair Instructions · issued Feb 6, 2013
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
No NHTSA recall campaigns name the 1997 Mitsubishi Diamante in our current data. Recalls may apply only to certain VIN ranges — always confirm with a VIN check.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 1997 Mitsubishi Diamante?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.