What Causes the Squealing Noise When Braking?
1 Answers
Brake noise can be caused by various reasons, generally including the following aspects: 1. Running-in period for new cars or newly replaced brake pads leading to brake disc noise. New cars or newly replaced brake pads have a running-in period during which some noise may occur. Typically, the noise will disappear after the car has been driven for a few hundred kilometers. 2. Normal signal of ABS system activation. During emergency braking, the brake pedal may produce a continuous sound similar to 'thud-thud-thud,' sometimes accompanied by a 'pedal pulsation' phenomenon. This is caused by the activation of the ABS system and is normal. 3. Severe wear of brake pads triggering warning. Severe wear of brake pads can also cause brake noise. Most brake pads have a warning indicator. When the brake pads wear to their limit, the warning indicator will rub against the brake disc, producing a sharp sound. At this point, the brake pads should be replaced immediately to avoid accidents. 4. Severe wear of the brake disc. Severe wear of the brake disc can form deep grooves on the disc. Friction between the brake disc and the edges of the grooves can produce noise. If the grooves are not deep, the edges of the brake pads can be polished. If the grooves are deep, the brake disc needs to be replaced. 5. Foreign objects between the brake disc and brake pads. Small stones or a water film may exist between the brake disc and brake pads, which can cause noise. This can often be resolved by pressing the brakes a few more times or by removing the small stones.
