There is no fixed replacement cycle for brake pads and brake discs, which needs to be determined based on actual usage and testing results. Generally speaking, the following methods can be used to determine whether replacement is necessary:
Driving mileage: According to different brands and models of cars, the approximate replacement mileage can be determined by referring to the maintenance manual or the advice of the 4S store. In general, the replacement mileage of brake pads is around 30000 kilometers, and the replacement mileage of brake discs is around 50000 kilometers.
Brake warning light: Some cars have brake warning lights that automatically light up when the brake pads are worn to a certain extent, reminding the driver to replace them in a timely manner.
Brake thickness: The thickness of the brake pads and brake discs can be detected by visual inspection or special tools. If it is lower than the specified minimum thickness, it needs to be replaced. In general, the thickness of new brake pads is about 1cm, with a minimum thickness of about 3mm; The thickness of the new brake disc is about 2 centimeters, with a minimum thickness of about 1.5 centimeters.
Brake abnormal noise: If you hear a sharp sound of metal friction during the braking process, or feel the brake disc vibrate or vibrate, it may be due to excessive wear or deformation of the brake pads and brake discs, which need to be checked and replaced in a timely manner.
Braking effect: If the brake foot feels soft, the braking distance becomes longer, or the steering wheel leans to one side during the braking process, it may be due to uneven wear or failure of the brake pads and discs, which needs to be checked and replaced in a timely manner.