1993 Mitsubishi Diamante Problems
- Complaints
- 29filed with NHTSA
- Median mileage
- 108miles, 1 complaints with mileage
- Recalls
- 3campaigns on record
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
- NHTSA crash rating
- —overall rating starts with 2011 models
- EPA fuel economy
- 18 mpgcombined, 3.0L 6-cyl FWD · 16 city / 22 hwy
Sources: NHTSA records for the 1993 Mitsubishi Diamante (complaints, recalls, investigations), NHTSA crash tests, EPA fuel economy. Report an error
NHTSA recorded 29 consumer complaints for the 1993 Mitsubishi Diamante. The part named most often is air bags, with 10 complaints (34% of the total), followed by brakes (8) and transmission and drivetrain (7). 1 of the complaints include a mileage, and 100% of those were filed for vehicles with under 50,000 miles; the median is 108 miles. Of all complaints, 10 involved a crash, 1 a fire, 7 an injury, according to the filers. NHTSA lists 3 recall campaigns and 4 technical service bulletins for this model year. Brakes complaints overlap with 2 recall campaigns covering the hoses, lines/piping, and fittings filed under the same part.
Not compared (before 2008). Model years 2008–2023 of the same vehicle that have at least 25 complaints are compared, and a model needs at least 3 of them.
Which parts are reported most
Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.
- Air bags10 34%
- Brakes8 28%
- Engine cooling3 10%
- Body and structure2 6.9%
- Vehicle speed control2 6.9%
- Electrical system1 3.5%
- Equipment1 3.5%
- Other or unknown1 3.5%
- Seat belts1 3.5%
Also reported: Suspension (1), Tires (1), Visibility (wipers, defrost, mirrors) (1).
Example complaints
Air bags: “While traveling on the highway without prior warning, the dual airbags went off which caused hitting a ditch. Please fill in additional information dealer is aware of the problem. Ph”
NHTSA complaint #8024029, filed 2002-12Brakes: “I am having problems with my braking system. I had my brakes fixed in february 2001, it is now 10/2001 and I have had the brakes replaced again. I am a safe driver and do not drive dangerously or wreckless. I do not understand how wear and tear occured so quickly. My front end vibrates vigorously while breaking. Stopping several feet past the point where I breaked. The brake pedal went all the way to the floor. I have to stop way ahead of a stop. Also, my car shakes and the brake pedal vibrates when I try to stop. …”
NHTSA complaint #753653, filed 2001-10Transmission and drivetrain: “Vehicle would remain in lower gears while in normal operation, running rpms up higher than it should have been. Consumer took vehicle to a dealership, who replaced transmission from another vehicle. Vehicle operated normally until september 2000, when transmission would rev up to excessive rpms at speed being traveled. Please provide any additional information/attachments.”
NHTSA complaint #886774, filed 2001-04Engine cooling: “'93 Mitsubishi Diamante. Bought in '98 has smoked after idling at stops for years and I thought it was normal for this make and have found that a lot of Mitsubishi's have the problem also and would like to know the cause. Mechanic's say new engine is needed, but new cars also smoke? Compression is good so what is the underlying problem? Also will not pass deq which is illegal to drive with that much smoke!”
NHTSA complaint #10142504, filed 2005-11, 108 milesMileage when problems were reported
100% of the 1 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 108 and 108 miles.
Complaints by year filed
Trend: stable. Complaints filed in the last 3 full calendar years are within 25% of the 3 years before.
Crash test ratings
NHTSA's 5-Star Safety Ratings for the 1993 Mitsubishi Diamante. Frontal results are shown driver / passenger; rollover shows the star rating and NHTSA's estimated risk of rolling over in a single-vehicle crash.
| Version | Overall | Frontal | Side | Side pole | Rollover |
|---|---|---|---|---|---|
| Diamante · sedan | not rated | 4 / 4 | — | — | — |
Ratings before the 2011 model year come from an older, less demanding test and are not comparable with ratings for 2011 and later.
Source: NHTSA New Car Assessment Program (5-Star Safety Ratings), nhtsa.gov/ratings.
Fuel economy and running cost
EPA ratings for each 1993 Mitsubishi Diamante version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).
| Version | Engine | Transmission | City | Hwy | Comb. | Fuel / yr |
|---|---|---|---|---|---|---|
| Diamante FWD | 3.0L 6-cyl | 4-speed automatic | 16 | 22 | 18 | $4,550 |
| Diamante FWD | 3.0L 6-cyl | 4-speed automatic | 16 | 23 | 18 | $4,550 |
| Diamante Wagon FWD | 3.0L 6-cyl | 4-speed automatic | 17 | 23 | 19 | $4,350 |
Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.
Recalls and investigations
- 96V143002Aug 12, 1996Service brakes, hydraulic › Foundation components › Hoses, lines/piping, and fittingsCovers: Mitsubishi Diamante 1992–1994, 3000GT 1991–1994, Montero 1992–1994
Under conditions of full lock steering and full suspension travel, the left or right front wheel-side brake hose can crack, resulting in brake fluid leakage.
- 96V143001Jul 25, 1996Service brakes, hydraulic › Foundation components › Hoses, lines/piping, and fittingsCovers: Mitsubishi Diamante 1992–1994, 3000GT 1991–1994, Montero 1992–1994
Under conditions of full lock steering and full suspension travel, the left or right front wheel-side brake hose can crack, resulting in brake fluid leakage.
- 93V044000Mar 16, 1993Seat belts › Front › AnchorageCovers: Mitsubishi Diamante 1993
The rear outboard lower safety belt attachment bolt was inadequately torqued on installation.
Recall details for the 1993 Mitsubishi Diamante → · Check a VIN at nhtsa.gov/recalls
Technical service bulletins
TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 4 on record; the latest 4 are shown.
- 10169006Nov 26, 2019Equipment. This is a service newsletter (Tech Talk) that was sent out to dealers.
- 10163703Jul 30, 2019Equipment. 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.
- 10130469Feb 26, 2018Equipment. This is a service newsletter (Tech Talk) that was sent out to dealers.
- 10170852Jan 29, 2013Body and structure. This Technical Service Bulletin updates the door adjustment procedure in the Body Section of the applicable service manuals.
Other model years of the Mitsubishi Diamante
| Year | Complaints | Median mi | Recalls | Crash ★ | MPG | Score (50 = typical) | Trend |
|---|---|---|---|---|---|---|---|
| 2003 | 56 | 57,500 | 2 | — | 18 | Not compared (before 2008) | Stable |
| 2002 | 123 | 60,000 | 3 | — | 18 | Not compared (before 2008) | Stable |
| 2001 | 78 | 59,750 | 2 | — | 18 | Not compared (before 2008) | Stable |
| 2000 | 51 | 57,171 | 3 | — | 18 | Not compared (before 2008) | Stable |
| 1999 | 23 | 86,450 | 2 | — | 18 | — | Stable |
| 1998 | 27 | 71,750 | 1 | — | 18 | Not compared (before 2008) | Stable |
| 1997 | 34 | 111,566 | 0 | — | 19 | Not compared (before 2008) | Stable |
| 1995 | 12 | 137,500 | 0 | — | 19 | — | Not enough data |
| 1994 | 27 | 50,015 | 2 | — | 19 | Not compared (before 2008) | Stable |
| 1993 | 29 | 108 | 3 | — | 18 | Not compared (before 2008) | Stable |
| 1992 | 42 | 120,000 | 2 | — | 19 | Not compared (before 2008) | Stable |
All Mitsubishi Diamante model years · Best and worst years by complaints
Frequently asked questions
How many NHTSA complaints does the 1993 Mitsubishi Diamante have?
NHTSA recorded 29 consumer complaints for the 1993 Mitsubishi Diamante as of Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
What part of the 1993 Mitsubishi Diamante is reported most often?
Air bags is named most often, in 10 complaints (34% of the total), followed by brakes with 8.
Has the 1993 Mitsubishi Diamante been recalled?
NHTSA lists 3 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.
What gas mileage does the 1993 Mitsubishi Diamante get?
The EPA rates the 1993 Mitsubishi Diamante (Diamante, 3.0L 6-cyl) at 18 mpg combined, 16 city and 22 highway, with an estimated annual fuel cost of $4,550 at 15,000 miles a year. Other engine and drive versions are rated differently.
At what mileage are problems with the 1993 Mitsubishi Diamante reported?
Among the 1 complaints that include a mileage, the median is 108 miles and the middle half falls between 108 and 108 miles; 100% were filed for vehicles with under 50,000 miles.
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Crash ratings are from NHTSA’s New Car Assessment Program. Fuel economy is from the EPA and DOE (fueleconomy.gov).
Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.