What Causes the High-Pitched Squealing Sound When Braking in a New Car?

1 Answers
VonFrank
07/29/25 11:10pm
Reasons for high-pitched squealing sounds when braking: 1. Warning indicators produce sharp noises to prompt replacement: Most vehicle braking systems are equipped with an alert mechanism to notify drivers when brake pads need replacing. Once the brake pads wear beyond the designated threshold, the warning indicator emits a piercing noise, urging the driver to inspect or replace the brake pads at a service center. Neglecting this can result in the metal warning indicator carving deep grooves into the brake disc, rendering it unusable. Additionally, excessively worn brake pads may lead to brake failure, posing serious safety risks. 2. Severely worn brake discs causing noise: If the brake disc is heavily worn, the outer edge—where it doesn’t make contact with the brake pad—can develop a raised ridge. When the corner of the brake pad rubs against this ridge, it may produce noise. Solutions include having the brake pad edges smoothed at a service center to avoid contact with the ridge or opting for a complete brake disc replacement. 3. High-pitched squealing when braking in new cars: Many drivers assume this indicates a manufacturing defect. However, new brake pads and discs require a break-in period. The noise often occurs when braking happens to grind against a hard spot in the pad (due to material composition). Applying lubricant at a service center can help reduce the noise.
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