How to determine if the brake pads need to be replaced?

Listen to the sound, mainly the sound made when braking. This is also easy to understand, after all, brake pads with different degrees of wear will have certain differences when braking, and the general situation can be determined from the sound emitted. When the car is running normally, lightly apply the brake. If you hear a slight sound similar to friction between iron and steel, it basically indicates that the brake pads have been severely worn and must be replaced in a timely manner, otherwise it may cause brake failure. When replacing the brake pads, it is also necessary to conduct relevant inspections on the brake discs to see if there is any wear. If the wear is severe, it is best to replace the brake discs together when replacing the brake pads to ensure that everything is safe.