Total Complaints
3 filings
BMW 6-SERIES · model year
2004 BMW 6-SERIES
3 NHTSA complaints for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 2004BMW6-SERIES 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 6-SERIES is engine and engine cooling:engine with 1 filings, followed by electrical system (1) and 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.
NHTSA currently has 34 investigation files overlapping the 2004 6-SERIES. 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 |
|---|---|
| ENGINE AND ENGINE COOLING:ENGINE | 1 |
| ELECTRICAL SYSTEM | 1 |
| POWER TRAIN:AUTOMATIC TRANSMISSION | 1 |
Recent Complaints
20110425POWER TRAIN:AUTOMATIC TRANSMISSION
BMW 645CI: TRANSMISSION SURGES BETWEEN SPEEDS OF 30-40MPH WHILE APPLYING CONSTANT THROTTLE. *TR
Mileage: 45,000
20041005ELECTRICAL SYSTEM
VEHICLE STALLS AND DIES WHILE IDLING OR ON TURNING. VEHICLE RESTARTS AFTER STALL, BUT ALL STEERING IS LOST UNTIL RESTARTED. BMW HAS REPLACED THE MAIN COMPUTER CONTROL BOARD TWICE (DME). STALLING IS STILL EVIDENT. TOTAL NUMBER OF KNOWN STALLS - 4. ALSO, BASED ON POSTINGS ON HTTP://BIMMER. ROADFLY.ORG/BMW/FORUMS/E63/ IT APPEARS OTHERS HAVE EXPERIENCED PROBLEMS WITH HARDWARE/SOFTWARE ON THIS MAKE, BUT PERHAPS NOT TO THE SAME SAFETY LEVEL AS MINE. ALMOST IDENTICAL COMPLAINT ON FILE WITH YOU:MAKE: BMW MODEL: 6 SERIES YEAR: 2004 COMPLAINT NUMBER: 10091708 SUMMARY: 2004 BMW 645: WHILE DRIVING 20 MPH VEHICLE STALLED AND CONSUMER WAS ABLE TO RESTART THE VEHICLE. CONSUMER TOOK THE VEHICLE TO DEALERSHIP FOR INSPECTION. DEALERSHIP WAS UNABLE TO DUPLICATE PROBLEM. THE ENGINE STALLING PROBLEM RECURRED AND THE VEHICLE WAS TAKEN BACK TO THE DEALER FOR INSPECTION. AGAIN, DEALERSHIP COULD NOT UNCOVER ANY DEFECT OR MALFUNCTION AND THE VEHICLE IS OPERATING AS DESIGNED. *AK
Mileage: 500
20040909ENGINE AND ENGINE COOLING:ENGINE
2004 BMW 645: WHILE DRIVING 20 MPH VEHICLE STALLED AND CONSUMER WAS ABLE TO RESTART THE VEHICLE. CONSUMER TOOK THE VEHICLE TO DEALERSHIP FOR INSPECTION. DEALERSHIP WAS UNABLE TO DUPLICATE PROBLEM. THE ENGINE STALLING PROBLEM RECURRED AND THE VEHICLE WAS TAKEN BACK TO THE DEALER FOR INSPECTION. AGAIN, DEALERSHIP COULD NOT UNCOVER ANY DEFECT OR MALFUNCTION AND THE VEHICLE IS OPERATING AS DESIGNED. *AK (VEHICLE BUILD DATE: MAY 4, 2004 - EXCLUDED FROM SAFETY RECALL 04V-344, WHICH HAS A BUILD DATE RANGE BEGINNING WITH MAY 12, 2004) *MJJ
Compare 2004BMW6-SERIES to Similar Vehicles
NHTSA Investigations
Frequently Asked Questions
How many complaints does the 2004 BMW 6-SERIES have?▼
The 2004 BMW 6-SERIES has 3 NHTSA complaints, 0 crashes, 0 fires, 0 injuries, and 0 deaths reported.
What are the most common problems with the 2004 BMW 6-SERIES?▼
The most-complained component for the 2004 BMW 6-SERIES is ENGINE AND ENGINE COOLING:ENGINE with 1 complaints. Other frequently reported areas include ELECTRICAL SYSTEM and POWER TRAIN:AUTOMATIC TRANSMISSION.
Is the 2004 BMW 6-SERIES 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.