What Causes the Abnormal Noise When Drum Brakes Are Applied?

1 Answers
GabrielaDella
07/30/25 7:58am
Drum brakes may produce abnormal noise for the following reasons: 1. Break-in period: If it is a new car or newly replaced brake discs and pads, there will be a break-in period during which some abnormal noise may occur. This usually disappears after driving a few hundred kilometers. 2. Foreign objects in the brake pads: There may be small metal particles inside the brake pads, which can produce a sharp, piercing sound when the brakes are lightly applied. 3. Severe wear of brake pads: Generally, brake pads come with wear indicators. When the brake pads wear down to their limit, the wear indicators will rub against the brake discs, producing a sharp metal friction sound.
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