How many kilometers should a car drive before the brake discs need to be replaced?
1 Answers
Generally, a car needs to replace the brake discs after driving 70,000 kilometers. There are three main methods to determine when to replace the brake discs: First: Based on the number of brake pad replacements. More frequent brake pad replacements indicate greater wear on the brake discs. Typically, the brake discs should be replaced after the brake pads have been changed two to three times. Since both the brake pads and discs wear relatively, it's essential to inspect the brake discs whenever the brake pads are replaced. Second: Listen for sounds. When lightly braking, if a loud hissing or squealing noise occurs, it's time to replace the brake discs. In this case, the brake pads must be replaced immediately because the wear indicators on both sides of the pads are already directly rubbing against the discs, indicating the pads have exceeded their limit. Additionally, some low-quality brake pads may have hard spots that cause unusual noises, which usually disappear after some time as the spots wear off. Third: Check for wear. Most brake disc products come with wear indicators, typically three small dimples distributed on the disc surface. Using a vernier caliper, measure the depth of these dimples, which is usually 1.5mm. This means that when the total wear depth on both sides of the brake disc reaches 3mm, it is recommended to replace the brake discs promptly.
