2000 Mitsubishi Diamante problems & reliability
51 owner complaints filed with NHTSA for the 2000 Mitsubishi Diamante, alongside 3 safety recall campaigns. 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.
3 complaints report injuries (7 injured).
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Visibility → | 27 | 53% |
| Engine and Engine Cooling | 7 | 14% |
| Fuel System, Gasoline | 3 | 6% |
| Power Train | 3 | 6% |
| Service Brakes, Hydraulic | 3 | 6% |
| Vehicle Speed Control | 3 | 6% |
| Air Bags | 2 | 4% |
| Electrical System | 2 | 4% |
| Unknown OR Other | 2 | 4% |
| Fuel System, Other | 1 | 2% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
All 16 reported components →Mileage when problems occurred
Among the 22 complaints that included a usable odometer reading, the median reported incident mileage was 57,171 miles (middle 50% between 40,294 and 79,577 miles).
Complaints by incident year
What owners report
“2000 mitsubishi diamante. Consumer states vehicle surged forward. *tgw the consumer stated when leaving a parking lot and attempting to pull into traffic, the vehicle barely moved at 5 mph, even though he was pressing on the accelerator and the rpm was not moving. After going about 1/4 of a mile, all of a sudden the…”
Vehicle Speed Control · filed Apr 6, 2010
“When I first start the car, drive about a half block, obtain desired speed, take my foot off the accelerator, and then when the car slows down, I press down on the accelerator, nothing happens. So I press down further on the gas pedal, and suddenly the car lurches forward out of control. So then I have to immediately…”
Vehicle Speed Control · filed Feb 10, 2010
“My wife and I noticed antifreeze odor coming in through vents. When our windows would fog, our defroster wouldn't work. Then our passenger side floor was soaked with antifreeze. We took the car to the dealer, our heater core was leaking. Cost was $1300 to repair. Mitsubishi should be held responsible!! Too many…”
Engine and Engine Cooling · filed Sep 29, 2008
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Technical service bulletins
62 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2000 Mitsubishi Diamante. The 10 most recent:
This is a Dealer Letter sent to dealers informing that Mitsubishi Technical Training has launched the 3rd quarterly technician quiz for 2023.
DEALER LETTER · Service Bulletin/Repair Instructions · issued Jul 21, 2023
This Technical Service Bulletin provides instructions and material safety data sheets for removal of rap-film adhesive residue.
TSB-23-00-004 · Service Bulletin/Repair Instructions · issued Apr 24, 2023
This Technical Service Bulletin reviews the regulations that require a label showing the reduction in load carrying capacity be affixed to vehicles when the total net weight of accessories is more than 1.5 percent of…
TSB-23-00-001 · Service Bulletin/Repair Instructions · issued Apr 24, 2023
This is a Dealer Letter sent to dealers informing that Mitsubishi Technical Training has launched the 2nd quarterly technician quiz for 2023.
DEALER LETTER · Service Bulletin/Repair Instructions · issued Apr 21, 2023
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 message sent to dealers, to inform them that an update for MEDIC will be available.
MEDICUpdate517 · Service Bulletin/Repair Instructions · issued Feb 27, 2018
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
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
The 2000 Mitsubishi Diamante has 3 NHTSA recall campaigns — recall repairs are free at franchised dealers regardless of the vehicle’s age.
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 2000 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.
- · Among complaints with usable mileage, the median reported incident mileage was 57,171 miles. This does not predict when a particular vehicle will develop a problem.