2003 Mitsubishi Diamante
US · Midsize Cars
The 2003 Mitsubishi Diamante is listed in the US market with gasoline power. Every figure below carries the source it came from, and anything our sources do not publish is left out rather than estimated.
- Engine
- 3.5L 6-cylinder (SOHC)
- Transmission
- 4-speed automatic
- Drivetrain
- FWD
- Fuel
- Gasoline
- Economy
- 18 mpg (13.1 L/100 km) combined
Key Figures
Engine
| Specification | Value | Source |
|---|---|---|
| Engine | 3.5L 6-cylinder (SOHC) | |
| Displacement | 3.5 L | |
| Cylinders | 6 | |
| Fuel type | Gasoline | EPA fueleconomy.gov |
Transmission and drivetrain
| Specification | Value | Source |
|---|---|---|
| Transmission | Automatic | EPA fueleconomy.gov |
| Gears | 4 | |
| Drivetrain | FWD | EPA fueleconomy.gov |
Fuel economy and range
| Specification | Value | Source |
|---|---|---|
| Combined | 18 mpg (13.1 L/100 km) | EPA fueleconomy.gov |
| City | 16 mpg (14.7 L/100 km) | |
| Highway | 23 mpg (10.2 L/100 km) |
Our sources do not publish these for this vehicle: Aspiration, Power, Torque, Electric range, Battery capacity. We leave them out instead of estimating.
Trims and configurations
1 configuration listed by our sources. Engines, drivetrains and fuel economy can differ between them.
Recalls
NHTSA lists 2 recall campaigns for this model year. Last checked November 4, 2026.
04V428000: 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. IN ADDITION, ALL CURRENT 2000-2004 NATIVA OWNERS WILL ALSO RECEIVE…
Reported September 1, 2004. View on NHTSA
04V067000: 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. THE RECALL BEGAN ON MARCH 29, 2004. OWNERS…
Reported February 11, 2004. View on NHTSA
Data sources
- EPA fueleconomy.gov · retrieved November 9, 2026 · US Government public data
- NHTSA vPIC · retrieved October 18, 2026 · US Government public data
Source checked: November 9, 2026
Data verified: November 9, 2026
Specifications can vary by market, trim, configuration and production date. Confirm with the manufacturer before buying parts or making safety decisions. Report an error.
Related vehicles
- 2002 Mitsubishi Diamante
Gasoline
3.5L 6-cylinder (SOHC) · FWD
18 mpg (13.1 L/100 km) - 2004 Mitsubishi Diamante
Gasoline
3.5L 6-cylinder (SOHC) · FWD
18 mpg (13.1 L/100 km)
Frequently asked questions
What engine does the 2003 Mitsubishi Diamante have?
3.5L 6-cylinder (SOHC). Engines can differ by trim, so check the trim list below.
What is the fuel economy of the 2003 Mitsubishi Diamante?
Combined fuel economy is 18 mpg (13.1 L/100 km), as published by the source shown in the specification table.
Is the 2003 Mitsubishi Diamante front-wheel, rear-wheel or all-wheel drive?
Drivetrain: FWD.
Are there recalls for the 2003 Mitsubishi Diamante?
NHTSA lists 2 recall campaigns for this model year (last checked November 4, 2026). Details are in the Recalls section.