2004 BMW 645CI Brakes Problems
- Complaints
- 2about this part
- Share
- 18%of 11 total for the year
- Median mileage
- 120,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the brakes of the 2004 BMW 645CI, 18% of the 11 complaints for this model year. Where a mileage was given, the median is 120,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“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. …”
NHTSA complaint #10484964, filed 2012-11, 150,000 miles“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 power booster would need to be replaced. …”
NHTSA complaint #10463301, filed 2012-06, 90,000 milesRelated service bulletins
- 10194296Apr 1, 2021Diagnosis of Compound Brake System Complaints in M Vehicles: 1. Visible cracks are caused by high thermal stresses during rapid heating and cooling of the brake discs. Braking…
Brakes: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2005 | 6 | 18% |
| 2004 | 2 | 18% |
Other parts of the 2004 BMW 645CI
5 complaintsSeat belts
4 complaintsElectrical system
3 complaintsSeats
2 complaintsElectronic stability control
1 complaintsEngine
1 complaintsEngine cooling
1 complaintsSteering
1 complaintsTransmission and drivetrain
1 complaintsWheels
1 complaints
← All problems reported for the 2004 BMW 645CI
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology