1994 Mitsubishi Diamante problems & reliability
27 owner complaints filed with NHTSA for the 1994 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.
2 complaints report injuries (2 injured).
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Air Bags | 6 | 22% |
| Service Brakes, Hydraulic | 6 | 22% |
| Seat Belts | 4 | 15% |
| Tires | 3 | 11% |
| Engine and Engine Cooling | 2 | 7% |
| Equipment | 2 | 7% |
| Exterior Lighting | 2 | 7% |
| Power Train | 2 | 7% |
| Vehicle Speed Control | 2 | 7% |
| Fuel System, Gasoline | 1 | 4% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
All 12 reported components →Complaints by incident year
What owners report
“Tl* the contact owns a 1994 mitsubishi diamante. While driving at various speeds, the air bag warning light illuminated. The failure recurred whenever the vehicle was in operation. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was 100,000.”
Air Bags · filed Jun 21, 2016
“Consumer states purchased new tire on 12/6/02. On 12/24/02 while driving tire blewout causing extensive damage to vehicle. Tire info: b.f. Goodrich ph p205/65r15 right front tire 30 miles on tire damage to vehicle tire not original”
Tires · filed Jan 6, 2003
“Purchased with 14,000 from dealer, had a major engine falure due to piston ring wear/falure. Had it repaired 10,000 ago mits paid for parts, I paid $1,200 for labor. Now 10,000 miles later I have the same problem again. This is my 2nd mits car I have had the same problem with that had to be rebuilt.”
Engine and Engine Cooling · filed Sep 5, 2002
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Technical service bulletins
17 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 1994 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 Technical Service Bulletin updates the door adjustment procedure in the Body Section of the applicable service manuals.
TSB-13-42A-002 · Service Bulletin/Repair Instructions · issued Jan 29, 2013
This bulletin contains recommended automatic transmission / transaxle maintenance information. *tt
9923010 · Service Bulletin/Repair Instructions · issued Oct 1, 1999
Mmsa has determined that under certain conditions, the front lower brake hoses may develop a crack, causing a loss of brake fluid. *tt
96V143 · Service Bulletin/Repair Instructions · issued Aug 28, 1998
Information about improved automatic transaxle end clutch. *tt
TSB9723015 · Service Bulletin/Repair Instructions · issued Dec 1, 1997
Information containing additional glass antenna cautions and inspection procedures. *yc
97110154013 · Service Bulletin/Repair Instructions · issued Nov 1, 1997
Service manual revision on supplemental restraint system (srs) cautions and warnings. *yc
97090152B003 · Service Bulletin/Repair Instructions · issued Sep 1, 1997
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 1994 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 1994 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.