Why Does the Brake Make Noise?
2 Answers
Reasons why the brake makes noise: 1. Using low-quality or overly hard brake pads; 2. Presence of sand or foreign objects between the brake pads and brake disc; 3. Brake pad warning—if the wear level of the brake pads reaches the warning line, it will emit a squeaking alarm sound, indicating the need for immediate replacement. Brake noise is a significant issue and must not be ignored. Like tires, brakes are the first line of defense for the driver's safety, so negligence is not an option. Solutions for brake noise: 1. Use genuine, quality-certified brake pads and regularly inspect the brake system; 2. Severe wear on the brake disc—wear on the brake disc can form deep grooves around the disc, causing noise when the brake pads rub against the edges of these grooves. If the grooves are not too deep, the issue can be resolved by grinding the edges of the brake pads to avoid friction with the groove edges. If the grooves are already very deep, it is recommended to replace the brake disc.
This is quite common, and I've talked to many experienced drivers about it. Most of the time, squeaky brakes mean the brake pads are worn out, and the little metal tabs inside are rubbing against the brake rotors, making that clicking noise as a warning. It could also be a small stone stuck in the brake rotor, which usually falls out after driving for a while. Once after rain, my car's brakes squealed, and the mechanic said it was just a thin layer of rust on the rotors—a few hard stops cleared it right up. But if the noise is constant and sounds like a whistle, it's likely the brake pads are too hard or there's a foreign object stuck in them, and you should get it checked immediately. Another less common reason is a bent brake shield rubbing against the rotor, which just needs a quick adjustment.
