Can the brake sensor wire of BMW 5 Series be reset?
2 Answers
BMW 5 Series brake sensor wire can be reset. Brake wear: Severe wear of the brake pads causes the expansion shaft to reach its maximum limit and become stuck, unable to return to position. This is common in older vehicles with prolonged use, and the brake pads need to be replaced. High resistance in the brake wire: Excessive resistance in the brake wire is often due to water ingress causing rust or freezing, oil ingress, or dust accumulation leading to stickiness. It is recommended to replace the brake wire. Wear of the rear wheel brake expansion shaft: Severe wear of the rear wheel brake expansion shaft. This is common in older vehicles that have had brake pads replaced, where the working surface of the expansion shaft is severely worn and stuck. Wear of the transmission mechanism: Such as unreasonable routing of the brake wire, aging or deformation of the wire sheath, etc. Specific analysis is required for different models. If you cannot handle it yourself, it is recommended to consult a mechanic for assistance.
My BMW 5 Series had its brake pads replaced last year, and the mechanic specifically taught me how to reset the sensor wire. This brake wear sensor must be reset after installing new pads; otherwise, the dashboard will keep giving warnings. For older 5 Series models, you can use the BC button on the dashboard: hold the BC button for 10 seconds with the engine off, then start the vehicle and continue pressing until the maintenance light flashes to confirm. For newer models, you need to use the iDrive system to manually reset the maintenance data in the 'Vehicle Status' menu. If you can't manage it yourself, a visit to the dealership will have it fixed in two minutes with a computer—the key is that the system can only monitor the thickness of the new brake pads after resetting.
