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What Causes the Squeaking Sound When Braking at Car Startup?

1 Answers

MacAubree

07/24/25 10:00am

The reasons for the squeaking sound when braking at car startup are: 1. Use of low-quality or overly hard brake pads; 2. Presence of sand or foreign objects between the brake pads and brake discs. Due to the unique design of disc brakes, some sand and foreign objects may inevitably get between the brake pads and discs, causing noise during braking; 3. Severe wear of the brake discs; 4. Brake pad warning. If the wear level of the brake pads reaches the warning line, it will emit a squeaking alarm sound. Car brake pads, also known as car brake linings, generally consist of steel plates, adhesive heat insulation layers, and friction blocks. They refer to the friction materials fixed on the brake drums or discs that rotate with the wheels. The friction linings and friction blocks within them bear external pressure to generate friction, thereby achieving the purpose of vehicle deceleration.

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