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What Causes the Abnormal Noise When Reversing in a BMW 525?

1 Answers

SanAlan

07/30/25 3:52am

BMW 525 experiencing abnormal noise when reversing is primarily due to abnormal retraction of the brake caliper piston, friction noise caused by rust on the brake disc, and reversing noise caused by a faulty handbrake system. Abnormal retraction of the brake caliper piston: The generation of vehicle braking mainly relies on the tight contact between the brake pads and the brake disc, creating friction. The movement of the brake pads is facilitated by the thrust formed by the movement of the piston in the brake caliper. This is the reverse reasoning of the braking process. Solution: After braking is completed, use the accessories in the brake caliper. Friction noise caused by rust on the brake disc: Rust on the brake disc is a very common phenomenon, especially after driving through water. If parked for no more than two days, small rust spots will appear on the brake disc. Solution: It is recommended to go to an auto repair shop to remove the rust with sandpaper.

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