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Why Do Car Brakes Make Noise?

2 Answers

JordanLee

07/29/25 2:01am

Car brakes make noise due to the following reasons: 1. Presence of metal particles in the brake pads; 2. Excessive wear of the brake pads; 3. Excessive wear of the brake discs; 4. Installation issues. Solutions for noisy car brakes include: 1. Replacing with better-quality brake pads; 2. Reinstalling the brake pads. Wear on the brake discs can create deep grooves around the disc, and friction between the brake pads and the edges of these grooves can cause noise. If the grooves are not too deep, the issue can be resolved by grinding the edges of the brake pads to avoid contact with the groove edges. If the grooves are already very deep, it is recommended to replace the brake discs. Generally, it is advised to replace the brake discs once for every two brake pad replacements.

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StRiver

08/12/25 6:02am

I just started learning to drive recently and noticed a squeaking sound every time I brake, which makes me a bit worried. After asking an experienced driver friend, I learned that this could be due to severely worn brake pads—when the metal part directly rubs against the brake disc, it makes noise. Sometimes, dust or small stones get stuck in the braking system, and the noise goes away after driving for a while. If you park after a rainy day, rust can also create noise. In such cases, I usually gently brake a few times to clear the dust. If the sound persists, I go to check the brake pad thickness. Otherwise, delaying it could affect stopping distance or even lead to an accident. For regular maintenance, checking the brakes every 5,000 kilometers can reduce such noises and save on expensive repairs. I recommend that beginners also maintain their braking system regularly to avoid regrets after an accident.

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