2004 Bmw 645CI problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
11 owner complaints analyzed
0 distinct recall campaigns
75,000 mi median reported failure mileage
Scope: 2004 model year. Data snapshot: . 7 complaints include usable failure mileage.
Most common problems
Air Bags is the most frequently named component, appearing in 4 of 11 complaints (36.4%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Braking behavior | 2 | 18.2% |
| Electrical and battery issues | 2 | 18.2% |
| Engine operation | 1 | 9.1% |
| Steering behavior | 1 | 9.1% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Air Bags | 4 |
| Seat Belts | 4 |
| Electrical System | 3 |
| Seats | 2 |
| Service Brakes | 2 |
| Air Bags:Frontal | 1 |
| Air Bags:Sensor:Occupant Classification | 1 |
| Electronic Stability Control (Esc) | 1 |
Air Bags: 4; Seat Belts: 4; Electrical System: 3; Seats: 2; Service Brakes: 2; Air Bags:Frontal: 1; Air Bags:Sensor:Occupant Classification: 1; Electronic Stability Control (Esc): 1
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 0 |
| 25,000 to 49,999 | 1 |
| 50,000 to 74,999 | 2 |
| 75,000 to 99,999 | 2 |
| 100,000 to 149,999 | 1 |
| 150,000 and above | 1 |
Under 25,000: 0; 25,000 to 49,999: 1; 50,000 to 74,999: 2; 75,000 to 99,999: 2; 100,000 to 149,999: 1; 150,000 and above: 1
50,000 to 74,999 miles has the most reports with usable mileage (2). 4 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2011 | 1 |
| 2012 | 2 |
| 2013 | 1 |
| 2014 | 2 |
| 2015 | 1 |
| 2017 | 1 |
| 2018 | 1 |
| 2021 | 1 |
| 2024 | 1 |
2011: 1; 2012: 2; 2013: 1; 2014: 2; 2015: 1; 2017: 1; 2018: 1; 2021: 1; 2024: 1
Pattern summary
Air Bags leads the component reports. Braking behavior appears in 2 complaint narratives. Electrical and battery issues appears in 2 complaint narratives. Engine operation appears in 1 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 10463301 · 2012-06-27 (June 27, 2012)
TL* THE CONTACT OWNS A 2004 BMW 645CI. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 30 MPH, THE BRAKE PEDAL WAS APPLIED; HOWEVER THERE WAS NO RESPONSE. THE CONTACT REPEATEDLY ENGAGED THE BRAKE PEDAL AND THEN ENGAGED THE EMERGENCY BRAKE. THE VEHICLE CAME TO A COMPLETE STOP. THE VEHICLE WAS THEN TAKEN TO AN INDEPENDENT MECHANIC, WHO STATED THAT THERE WAS A RECALL ASSOCIATED WITH NHTSA CAMPAIGN ID NUMBER 10V446000 (SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM). THE VEHICLE WAS THEN TOWED TO AN AUTHORIZED DEALER AND THEY STATED THAT THE POW…
Owner-reported narrative. 90,000 miles reported. Look up ODI 10463301 at NHTSA ↗
Owner report 10484964 · 2012-11-16 (November 16, 2012)
TL* THE CONTACT OWNS A 2004 BMW 645CI. THE CONTACT STATED THAT THE VEHICLE WAS REPAIRED UNDER NHTSA CAMPAIGN ID NUMBER 10V446000 (SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM). THE CONTACT STATED THAT A YEAR AFTER THE REPAIRS WERE COMPLETED, A BRAKE FAILURE OCCURRED AND THERE HAD NOT BEEN A FAILURE PRESENT BEFORE THE VEHICLE WAS SERVICED UNDER THE RECALL. THE VEHICLE WAS TAKEN TO THE DEALER WHERE IT WAS CONFIRMED THAT THE MASTER CYLINDER AND BOOSTER HAD FAILED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED ABOUT THE ISSUE. THE F…
Owner-reported narrative. 150,000 miles reported. Look up ODI 10484964 at NHTSA ↗
Owner report 11118144 · 2018-08-06 (August 6, 2018)
PASSENGER SEAT OC3 OCCUPANCY MAT NOT WORKING-IT SHOWS A FAULT CODE- I TOOK IT TO BIRMINGHAM BMW AND WAS TOLD I HAVE TO GET A NEW BMW BATTERY AND BATTERY CABLE.THEY CHARGED ME $ 120 TO DIAGNOSE THIS PROBLEM BUT DID NOTHING TO FIX THE OC3 MAT THAT IS FAULTING.I HAVE CHECKED ON LINE AND THIS DOES NOTHING.
Owner-reported narrative. Look up ODI 11118144 at NHTSA ↗
Owner report 11431834 · 2021-09-06 (September 6, 2021)
The idrive system in my car continues to cut on and off, this eventually caused my car to shut off on me two times while in traffic with no warning or indication of the shut off. The sensor alert continuously goes off for everything in the car. I took my car to the BMW dealership in Huntsville Alabama, they had my car for almost a month and could not find the issue with the drive or anything the sensors were notifying me of. The system constantly says my car is overheating, but I just got the radiator hose fixed and the dealership checked it f…
Owner-reported narrative. Look up ODI 11431834 at NHTSA ↗
Owner report 10394508 · 2011-04-01 (April 1, 2011)
2004 BMW 645CI. CONSUMER STATES PROBLEM WITH VEHICLE STALLING SEVERAL TIMES. *TGW AN INDEPENDENT REPAIR SHOP PERFORMED A DIAGNOSIS AND CODES FOR THE CAMSHAFT SENSOR AND SOLENOIDS APPEARED. THE PARTS WERE REPLACED, HOWEVER THE STALLING CONTINUED. THE VEHICLE WAS TOWED TO THE REPAIR SHOP AND AGAIN AND THE MECHANIC PERFORMED ANOTHER DIAGNOSIS AND STATED THE PROBLEM WAS THE IDRIVE, BUT WHEN HE ATTEMPTED TO REPROGRAM THE IDRIVE, IT WAS DETERMINED THE CCC AND DME WERE BAD AND NEEDED TO BE REPLACED. *JB
Owner-reported narrative. Look up ODI 10394508 at NHTSA ↗
Owner report 10983391 · 2017-05-03 (May 3, 2017)
ACTIVE STEERING MALFUNCTION, AIRBAGS LIGHTS, STABLE CONTROLL STEERING WHEEL IS COCKED ABOUT HALF TURN TO DRIVE STREIGHT.
Owner-reported narrative. 75,000 miles reported. Look up ODI 10983391 at NHTSA ↗