What are the causes of parking brake failure in BMW 5 Series?
2 Answers
Introduction to the causes of parking brake failure in BMW 5 Series is as follows: 1. Insufficient brake fluid pressure: lack of oil in the brake master cylinder, brake pipe rupture, oil pipe joint leakage, oil circuit blockage. 2. Air in the brake system. 3. Excessive free travel of the brake pedal or excessive brake clearance: poor contact of the brake shoe friction plate, severe wear or oil contamination. The following are relevant extended materials: 1. Principle of electronic handbrake, the automatic parking function can be activated through a button behind the parking brake button. After selecting the function, the vehicle is hydraulically locked by DSC after braking to a stationary state. 2. When the engine is stationary, the parking brake continues to perform the parking function.
I've been driving a BMW 5 Series for several years, and there are quite a few reasons for parking brake failure. The most common ones are mechanical issues, such as loose or broken brake cables, which are particularly prone to happen in older models, especially after humid weather when rust causes the cables to jam and become unresponsive. Secondly, there are electronic system failures. Many BMW 5 Series models have electronic parking brakes, and a faulty control module or sensor can make the button unresponsive. There's also the issue of brake shoe wear or sticking, which requires regular replacement and cleaning. When parking, avoid pulling the handbrake too hard to reduce wear. If you notice any abnormalities, first check the fuse box for any blown fuses. It's recommended not to attempt DIY repairs—take it to a professional shop for diagnosis, as safety comes first. Don't delay repairs to avoid accidents.
