What is the replacement interval for car brake discs?
2 Answers
Brake discs are generally replaced every 50,000 to 80,000 kilometers. The replacement interval for brake discs is related to individual driving habits and road conditions. Here are methods to determine whether brake discs need replacement: Observe the replacement frequency of brake pads: If the brake pads are replaced frequently, it's necessary to check the thickness of the brake discs more often, because the use of brake pads and brake discs involves relative wear, so the brake discs should be checked regularly. Check the wear condition of the brake discs: Check if there are deep grooves exceeding 1 millimeter on the brake discs, whether the thickness on both sides is consistent, and whether the brake discs are uneven or have cracks. If any of these issues are present, the brake discs need to be replaced immediately. Follow a certain pattern: Car owners can also consider replacement based on a certain pattern. For example, replace the brake discs once for every two replacements of the brake pads.
With over 20 years of driving experience and having tried various car models, there's really no fixed rule for brake disc replacement intervals. It mainly depends on driving habits and road conditions. If you frequently brake hard or drive often in congested urban areas, the brake discs wear out faster and may need replacement at around 50,000 to 60,000 kilometers. For smooth highway driving, they can last over 70,000 to 80,000 kilometers. The key is to measure the disc thickness with calipers; the car manual specifies the minimum thickness, usually around 24mm—don't delay if it's below this standard. Last time, I replaced mine at 70,000 kilometers because of slight vibrations when braking. Don't forget to check the brake pads too; heavily worn pads can cause disc warping. During routine maintenance, ask the mechanic to measure it—it's free and quick. Safe driving is the top priority; don't cut corners to save small costs at the expense of safety.
