How often should brake discs be replaced?
2 Answers
Brake discs should typically be replaced after the vehicle has traveled approximately 80,000 to 100,000 kilometers. The steps for replacing brake discs are as follows: 1. Lift the vehicle and remove the tire. 2. Take off the old brake pads. 3. Push the brake piston back in and install the new brake pads. 4. Reinstall the brake caliper, tightening the caliper screws to the specified torque, then reinstall the tire. 5. Eliminate the gap between the brake pads and the disc to reset the brake piston. Situations that require brake disc replacement include: 1. The thickness of the brake disc is less than the minimum maintenance standard allowed by the vehicle manufacturer. 2. The wear indicator on the brake disc comes into contact with the disc. 3. The brake disc shows abnormal wear or tapered wear.
There's no strict time limit, it mainly depends on the actual wear condition. Every time I go for maintenance, I ask the mechanic to measure the thickness of the brake discs. If it's below the manufacturer's recommended value, I replace them. For example, when my old car had driven over 80,000 kilometers, I noticed steps worn on the edges of the brake discs and a metallic squealing sound during low-speed braking. Upon removal, the thinnest part was only 18mm, so I directly replaced them with a new set. Friends who frequently drive on mountain roads should check more often. Once, after returning from a trip along the Sichuan-Tibet line, I found the brake discs had worn unusually fast.
