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What are the reasons for car brake noise?

2 Answers

StSarah

07/28/25 10:24pm

Car brake noise occurs due to the following reasons: 1. When the brake disc rubs, it generates some metal powder, which can produce abnormal sounds when braking. Such noises from the brake pads are a normal phenomenon. 2. Brake noise indicates that the brake pads have reached their wear limit, causing the brake warning tab to rub against the brake disc, resulting in a metal-on-metal sound. Solutions for brake noise: 1. Firmly press the brakes several times or perform emergency braking in an open area to improve the situation. 2. It is necessary to replace the car's brake pads promptly to prevent potential hazards.

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McAugust

08/12/25 2:54am

I've driven for over a decade, and whenever the brakes make noise, I know it's time for inspection. The most common issue is when brake pads wear down to the metal, causing the exposed metal to grind against the rotor, resulting in a screeching sound. Sometimes, small stones or dust get stuck on the brake disc, especially after rain when road debris gets kicked up. Additionally, if the car sits too long or in humid weather, rust forms on the brake disc surface, leading to a harsh noise when starting. I recall during long mountain drives, frequent braking downhill would overheat and warp the brake pads, making the noise more pronounced—prompting me to take a break to let the system cool. I recommend lightly pressing the brakes before each drive to listen for issues. If there's a problem, visit a shop to replace the pads immediately. Delaying could damage both the pads and discs, leading to costly repairs.

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