Why is there a strange noise when braking while reversing?

[VonLila]

The reason for the strange noise when braking while reversing is due to the moving caliper hitting the caliper bracket during the reverse process. Below are the relevant explanations: 1. Radar system: When the car moves from the warning zone into the danger zone, the radar system automatically activates the braking device to control the car's reverse movement. The principle is based on an ordinary reverse radar system, with the addition of a servo mechanism that has a braking function. When the car moves from the warning zone into the danger zone, the controller sends a control signal to the braking servo, which immediately activates to automatically stop the car from moving backward, ensuring safe reversing. 2. Braking: When driving forward and braking, there is no 'play gap' at the lower connection point with the brake bracket, so no noise occurs. However, when braking in reverse, the brake caliper moves upward and hits the upper bracket, producing the strange noise.