How long to replace the old brake disc?

First, brake disc as a part that has been in a state of wear and tear since the beginning of the car, has a lot to do with everyone's driving habits. If you have bad driving habits and are not proficient in using the brakes, you often drive at high speeds If you brake suddenly during driving, the brake pads will wear out very quickly. In this case, it is generally necessary to replace them at about 70,000 kilometers.
Of course, for some old drivers with good driving skills and habits, the life of the brake discs will be much longer. After all, they will not brake suddenly like novices, and they can control the brakes with ease. Even for some "big guys" who often use manual transmission, the clutch is the "body" and the brake is only an auxiliary. They can control the speed well with only one clutch, and the brake is rarely even used. In this case, Whether it is the life of the brake pads or the brake discs will be doubled.
However, if you are not a veteran driver, but your driving skills are much better than that of a novice, you can judge based on the brake pads. If you have confidence in your driving skills, you can check the thickness of the brake pads at about 70,000 to 80,000 kilometers. If the thickness is only one-third of the original thickness, you must replace the brake pads in time. After the first brake pad, it is time to change the brake disc. Generally, the brake disc can be replaced at about 200,000 kilometers.