Total Complaints
3 filings
MITSUBISHI DIAMANTE · model year
2004 MITSUBISHI DIAMANTE
3 NHTSA complaints, and 1 active recall for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 2004MITSUBISHIDIAMANTE carries 3 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 0 crashes, 0 fires, 0 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.
Component-level analysis is where model-year complaints become actionable: the top complaint category for the 2004 DIAMANTE is power train with 2 filings, followed by power train:automatic transmission (1). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability. This model year has 1 active recall campaign, which means the manufacturer is obligated to remedy the covered defect at no charge for the life of the vehicle — the full NHTSA campaign numbers are listed below.
NHTSA currently has 14 investigation files overlapping the 2004 DIAMANTE. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.
3
Complaints
0
Crashes
0
Fires
0
Injuries
0
Deaths
Crashes Reported
0 reports
Source
NHTSA ODI
Federal complaints database
Complaints vs. fleet median (215)
At or below the fleet median complaint volume.
Complaints by Component
| Component | Count |
|---|---|
| POWER TRAIN | 2 |
| POWER TRAIN:AUTOMATIC TRANSMISSION | 1 |
Recalls (1)
04V42800001/09/2004
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.
Recent Complaints
20191108POWER TRAIN
THE DIAMANTE HAS AN ODD ISSUE WHERE THE VEHICLE WILL NOT SHIFT GEARS CORRECTLY WHICH AN EXTREMELY DANGEROUS ISSUE FOR DRIVERS. THE INFORMATION BOARD SHOWS THE TRANSACTION RAPIDLY SWITCHING FROM NEUTRAL TO DRIVE EXCESSIVELY. I HAVE HAD MULTIPLE MECHANIC SHOPS LOOK INTO THIS ISSUE FROM TRANSMISSION SPECIALISTS, TO ELECTRICAL SPECIALIST AND HAVE HAD NO POSITIVE RESULTS.
Mileage: 3
20120613POWER TRAIN:AUTOMATIC TRANSMISSION
CPSC#I11B0131A. 2004 MITSUBISHI DIAMANTE. F4A51 AUTOMATIC TRANSMISSION FAILURE. *LN THE CONSUMER STATED SHE HAS CONCERNS WITH THE SAFETY AND RELIABILITY OF MITSUBISHI AND DODGE VEHICLES AND THEIR OWNERS THAT HAVE THE MITSUBISHI F4A51 AUTOMATIC TRANSMISSION IN CERTAIN MAKE/MODELS. THE MAIN ISSUES SEEMED TO BE A MANUFACTURING DEFECT IN THE WAVE/CUSHION SPRING LOCATED IN THE TRANSMISSION DESIGNED THE WAVE SPRING AS A FRAGILE TWO COIL PIECE WHICH HAS BEEN KNOWN TO REPEATEDLY BREAK CAUSING CATASTROPHIC FAILURE IN THE TRANSMISSION. WHEN THE WAVE BREAKS, ACTUAL PIECES OF THE WAVE SPRING MAKE IT THROUGH MITSUBISHI'S ALSO FAULTY TRANSMISSION FILTER AND LODGE THEMSELVES IN THE PUMP GEAR,CAUSING THE HEAR TO ACTUALLY BREAK. AFTER THE PUMP GEAR HAS BEEN BROKEN INSIDE THE TRANSMISSION, ALL FORWARD AND REVERSE GEARS IMMEDIATELY STOP FUNCTIONING AND IN MOST INSTANCES THE VEHICLE SHUTS OFF. THE CONSUMER STATED SHE HAD THE F4A51 AUTOMATIC TRANSMISSION IN HER VEHICLE, WHICH HAD TO BE REPLACED. *JB
20111115POWER TRAIN
THE MAIN ISSUE SEEMS TO BE A MANUFACTURING DEFECT IN THE WAVE/CUSHION SPRING LOCATED IN THE TRANSMISSION. MITSUBISHI HAS DESIGNED THE WAVE SPRING AS A FRAGILE TWO COIL PIECE WHICH HAS BEEN KNOWN TO REPEATEDLY BREAK CAUSING CATASTROPHIC FAILURE IN THE TRANSMISSION. THIS IN TURN POSES A THREAT ON THE DRIVER AND PASSENGERS. WHEN THIS WAVE SPRING BREAKS, ACTUAL PIECES OF THE WAVE SPRING MAKE IT THROUGH MITSUBISHIS ALSO FAULTY TRANSMISSION FILTER AND LODGE THEMSELVES IN THE PUMP GEAR, CAUSING THE GEAR TO ACTUALLY BREAK. AFTER THE PUMP GEAR HAS BEEN BROKEN INSIDE THE TRANSMISSION, ALL FORWARD AND REVERSE GEARS IMMEDIATELY STOP FUNCTION AND IN MOST INSTANCES THE VEHICLE SHUTS OFF. THIS COULD RESULT IN POTENTIAL HARM OR EVEN DEATH OF THE DRIVER AND/OR PASSENGER AS THE VEHICLE LOSES ALL MOVING POWER WHICH CAN CAUSE AN ACCIDENT WITH OTHER VEHICLES ON THE ROAD. MITSUBISHI HAS RECENTLY CREATED AN UPDATED VERSION OF THE WAVE SPRING WITHOUT ISSUING A RECALL, WHICH NOW IS A ONE PI
Mileage: 50,000
Compare 2004MITSUBISHIDIAMANTE to Similar Vehicles
NHTSA Investigations
Frequently Asked Questions
How many complaints does the 2004 MITSUBISHI DIAMANTE have?▼
The 2004 MITSUBISHI DIAMANTE has 3 NHTSA complaints, 0 crashes, 0 fires, 0 injuries, and 0 deaths reported.
Are there any recalls for the 2004 MITSUBISHI DIAMANTE?▼
Yes, the 2004 MITSUBISHI DIAMANTE has 1 recall(s). The most common affected component is EQUIPMENT:OTHER:LABELS. Recalls are issued by NHTSA and manufacturers must provide a free remedy.
What are the most common problems with the 2004 MITSUBISHI DIAMANTE?▼
The most-complained component for the 2004 MITSUBISHI DIAMANTE is POWER TRAIN with 2 complaints. Other frequently reported areas include POWER TRAIN:AUTOMATIC TRANSMISSION.
Is the 2004 MITSUBISHI DIAMANTE safe to buy?▼
Review the complaint history, crash and fire reports, safety ratings, and recall status on this page to make an informed decision. No NHTSA crash test rating is available for this model year. Compare with other model years using the links above.
Where does this data come from?▼
All complaint, recall, and safety rating data is sourced from the National Highway Traffic Safety Administration (NHTSA). Complaints are filed by vehicle owners through NHTSA's Office of Defects Investigation.
Vehicle Safety Guides
Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Read our methodology — how this data is sourced, computed, and verified.