What Are the Reasons for Abnormal Noise When Braking in a Car?
2 Answers
The reasons for abnormal noise when braking in a car are: 1. Corrosion of the brake disc or brake pads; 2. New brake pads; 3. Excessive wear of the brake disc and brake pads; 4. Incorrect installation or mismatched model of brake pads; 5. Use of low-quality or overly hard brake pads; 6. Abnormal brake caliper or lack of brake fluid; 7. Presence of foreign objects between the brake drum or disc and the pads. Solutions for abnormal noise when braking in a car: 1. Apply butter or special lubricant at the connection between the brake pads and the brake caliper; 2. Regularly inspect and replace the brake pads; 3. Regularly adjust the brakes; 4. Avoid frequent use of the brakes.
When there is abnormal noise while stepping on the brakes, I think the most common cause is excessive wear of the brake pads. If the pads are too thin, the metal backing plate comes into contact with the brake disc, causing a squeaking sound. As soon as this sound appears, I immediately check the pad thickness. Generally, they should be replaced if they are below 3mm. Otherwise, braking performance will decline, and in emergency situations, delayed response can be dangerous. Additionally, if the noise persists after replacing the brake pads, it might be due to the new pads not being properly bedded in or loose fixing screws. Regular cleaning of the brake system during maintenance can also prevent such noises, especially after driving on muddy roads where dust can easily get stuck inside. Don’t take it lightly—safety comes first.
