What causes the buzzing sound from the right rear wheel after turning off the engine?

[OTucker]

This is a normal phenomenon. It is the sound of the exhaust pipe contracting, and the noise will disappear after a few minutes. Models equipped with electronic parking brakes may also experience this situation, which is the sound of the electronic parking brake motor and is also normal. Below are specific details about electronic parking brakes: 1. Principle: The working principle of electronic parking brakes is similar to that of mechanical handbrakes. Both essentially create friction between the brake disc and brake pads to achieve parking brake purposes, except that the traditional mechanical handbrake lever has been replaced by an electronic button. 2. Function: The parking brake is achieved through electronic control. Additionally, it extends to the vehicle's auto-hold function, allowing the driver to avoid prolonged braking when parking, effectively preventing the vehicle from rolling.