Is it necessary to resurface brake rotors?

[SanClayton]

Brake rotors do need resurfacing. During use, brake rotors experience wear. If the wear is uneven, the rotor surface may become uneven, with some areas higher and others lower. This can cause brake vibration and affect braking performance. When uneven rotors impact braking, they should be removed for resurfacing or replacement. Resurfacing can address most issues with brake pads and rotors, such as burrs, scratches, grooves, and other surface irregularities. Generally, if there are abnormal brake noises or pad issues, resurfacing can help. Its purpose is to improve the coordination between brake pads and rotors, ensuring proper brake system operation and restoring normal braking performance. However, excessive resurfacing force or frequency should be avoided, as this can thin the rotors, creating safety hazards and reducing their effectiveness and lifespan.

[ConnorDella]

I've been driving for over a decade and often get asked whether brake rotors should be resurfaced. Honestly, it depends on the specific situation. If you experience steering wheel vibration when braking or hear squeaking noises, the rotor surface is likely uneven—resurfacing can eliminate these issues and make braking smoother. It's also advisable to resurface old rotors when installing new brake pads to ensure perfect contact and reduce wear. However, if the rotor surface is smooth and even, there's no need for unnecessary work; excessive resurfacing can thin the rotors and shorten their lifespan. I recommend regular inspections for every vehicle, such as checking the braking system every six months—don't wait until safety becomes an issue. Once, I ignored this advice and nearly had an accident due to brake failure. Since then, I've made it a habit to check myself or have a mechanic inspect it—safety should never be taken lightly.

[DiLiam]

As a car DIY enthusiast, I love tinkering with the brake system myself. Polishing brake discs is something you can do on your own—it's cost-effective and saves time. Usually, after installing new brake pads or when the braking response feels sluggish, I check the disc surface for scratches or grooves. If any are found, I buy specialized sandpaper or a polishing machine to smooth them out at home. Just remember not to grind too much; keep the disc thickness within safe limits. For instance, if it's reduced to half the original thickness, it's time to replace the disc. All the necessary tools can be bought online for less than 100 yuan, which is much cheaper than spending hundreds at a repair shop. Always wear safety goggles to protect your eyes from debris. After finishing, test the smoothness of the brakes—it's incredibly satisfying! I also keep a vehicle maintenance log to track when polishing is needed, helping to extend the lifespan of the parts.

[ElianaDella]

From an automotive maintenance perspective, brake rotor resurfacing is not a mandatory service item; it depends on the disc's condition. If there are visible grooves, uneven wear causing brake noise or vibration, resurfacing can restore surface smoothness, improving braking efficiency and comfort. However, when the rotor surface is intact, unnecessary resurfacing wastes time and money, potentially accelerating disc wear. It's recommended to check rotor thickness during each brake pad replacement; if thickness falls below the manufacturer's minimum (e.g., 10mm), replace rather than resurface. Incorporating visual inspections during routine maintenance enables early issue detection, preventing larger expenses. Always prioritize safety by making case-by-case judgments.