How to Determine When to Replace Brake Discs?
2 Answers
There are primarily three methods to determine whether brake discs need replacement: 1. Judge based on the frequency of brake pad replacements: If brake pads are replaced frequently, it's necessary to check if the brake discs have become too thin. 2. Assess based on wear conditions: If there are deep grooves caused by foreign object abrasion on the brake discs, or uneven wear (some areas are thin while others are thick), it is advisable to replace them. Such uneven wear can directly affect the driver's safety. 3. Unusual noises during braking: The brake discs should be inspected. If the noise is caused by damage or scratches on the brake discs, they should be replaced promptly.
I think judging whether brake discs need replacement mainly depends on several easily observable points in daily use. For example, after parking, feel the surface of the disc—if there are noticeable ridges or deep grooves, it indicates severe wear. If the brakes vibrate intensely or produce sharp noises while driving, the discs are likely warped or damaged. Also, regularly use a flashlight to check for any cracks. Thickness is crucial—measure the edge thickness with a ruler; if it’s below the manufacturer’s recommended value, it’s time for a replacement. With 20 years of driving experience, I typically inspect them every 10,000–20,000 kilometers to avoid mid-journey safety issues. If unsure, visiting a repair shop for professional equipment testing is more reliable, as neglecting this can increase fuel consumption or cause accidents.
