One problem related to power assist brake vacuum has been reported for the 2005 BMW 645. The most recently reported issues are listed below.
2005 BMW 645ci. Consumer requests reimbursement for replacement of the brake vacuum pump and labor costs for vehicle the consumer stated the pump had to be replaced due to a significant amount of oil leaking which compromised the brake system. The consumer received a recall notice a month after having the vehicle repaired.
| Service Brakes problems | |
| Brake Master Cylinder problems | |
| Power Assist Brake Vacuum problems | |
| Brake Fluid Leak problems | |
| Brake Squeaking Noise problems |