Problems owners report
Complaints filed with NHTSA about the 2004 Mitsubishi Diamante, by the system named in each complaint. One complaint can name several.
- Power train3
NHTSA ODI complaints (public domain) · updated 23 Oct 2026 · 0 injuries and 0 deaths reported
Compared with other years
NHTSA ODI complaints by model year
In New Zealand
321 2004 cars are on the New Zealand register; 1% arrived as used imports, 98% were sold new in New Zealand.
NZ Transport Agency Waka Kotahi, Motor Vehicle Register (March 2026) · CC BY 4.0
Fuel consumption
Official Canadian test results for 2 variants: combined 13.1 L/100 km (about 18 mpg US), CO₂ 301 g/km.
| Variant | City | Highway | Combined |
|---|---|---|---|
| Diamante · Mid-size · Premium gasoline | 15.4 | 10.2 | 13.1 |
| Diamante · Mid-size · Premium gasoline | 15.4 | 10.2 | 13.1 |
Litres per 100 km. Natural Resources Canada, Fuel consumption ratings (open.canada.ca) · Open Government Licence – Canada
Recalls
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.
Whether a recall was fixed on a particular car is known only to the manufacturer: check the VIN at nhtsa.gov/recalls.
NHTSA recalls · summaries in NHTSA's own words
Service bulletins
What Mitsubishi told its dealers about the 2004 Mitsubishi Diamante: known faults, fixes and updates.
| Bulletin | Summary |
|---|---|
| 10240443 | This is a Dealer Letter sent to dealers informing that Mitsubishi Technical Training has launched the 3rd quarterly technician quiz for 2023. |
| 10235609 | This Technical Service Bulletin provides instructions and material safety data sheets for removal of rap-film adhesive residue. |
| 10235608 | 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 the vehicle's gross vehicle weight rating (GVWR) or 100 lbs. |
| 10235606 | This is a Dealer Letter sent to dealers informing that Mitsubishi Technical Training has launched the 2nd quarterly technician quiz for 2023. |
| 10211530 | 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. |
| 10170852 | This Technical Service Bulletin updates the door adjustment procedure in the Body Section of the applicable service manuals. |
| 10170102 | This is a service newsletter (Tech Talk) that was sent out to dealers. |
| 10170100 | This is a service newsletter (Tech Talk) that was sent out to dealers. |
| 10170099 | This is an index of Tech Talk newsletter articles released in 2012. |
| 10170097 | This is a service newsletter (Tech Talk) that was sent out to dealers. |
| 10170096 | This is a service newsletter (Tech Talk) that was sent out to dealers. |
| 10170087 | This is a service newsletter (Tech Talk) that was sent out to dealers. |
| 10170086 | This is a service newsletter (Tech Talk) that was sent out to dealers. |
| 10170074 | This is a service newsletter (Tech Talk) that was sent out to dealers. |
| 10170071 | This is a service newsletter (Tech Talk) that was sent out to dealers. |
| 10170070 | 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. |
| 10169006 | This is a service newsletter (Tech Talk) that was sent out to dealers. |
| 10163703 | 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. |
| 10130469 | This is a service newsletter (Tech Talk) that was sent out to dealers. |
| 10130468 | This is a message sent to dealers, to inform them that an update for MEDIC will be available. |
| 10019918 | LOOSE CENTER HIGH MOUNT STOP LAMP. *TT |
| 10019045 | REAR AXLE KNUCKLE ASSEMBLY BUSHING REPLACEMENT - SERVICE MANUAL REVISION. *TT |
| 10018377 | SPEEDOMETER INOPERATIVE. MITSUBISHI. TECH TALK. *TT |
| 10016754 | 2-3 SHIFT FLARE. *TT |
| 10015716 | SHIFT LEVER INDICATOR PANEL CHROME PEELING. MITSUBISHI TECH TALK. *TT |
NHTSA manufacturer communications (public domain)