What Causes the Abnormal Noise When Braking a New Car?
2 Answers
Abnormal noise from new brake pads may be caused by the initial break-in effect after installation. New brake pads and rotors require a break-in period, during which such noises may occur when braking. This is a normal phenomenon, and the sound will disappear after a period of break-in. Additional information: 1. Both brake rotors and pads are high-wear components. Each time the brakes are applied, these two parts experience friction, leading to natural wear over time. When the wear becomes excessive, abnormal noises will naturally occur, so regular inspection and replacement are necessary. Typically, brake pads should be replaced every 60,000-80,000 kilometers, while brake rotors should be replaced every 100,000-120,000 kilometers. 2. If the brake shield is loose, improperly installed after disassembly, damaged due to impact, or if the brake pads are completely worn out, the limit shim rubbing against the brake rotor can also produce noise. Generally, squeaking noises when the car is cold or after driving through water are normal. However, if the squeaking noise persists at any speed after the car has warmed up, it is recommended that the owner promptly visit a 4S shop or repair facility to diagnose and address the issue.
I just bought a new car not long ago, and occasionally hear a slight hissing or squeaking noise when braking. This situation is actually quite common. Most likely, the brake pads are still in the break-in period, and the uneven friction between the surface of the new brake pads and the brake discs after leaving the factory causes this issue—some brake pad materials with high metal content are more prone to making such sounds. Also, don’t overlook external factors, such as driving on roads with many small stones, which can get stuck in the braking system and create noise. If the sound isn’t continuous, observe it for a few days to see if it subsides. However, if it persists long-term, it’s necessary to get it checked—there might be improper installation or minor component defects. It’s recommended to visit a 4S shop when you have time and let a technician inspect it. Remember, regular brake system maintenance can extend its lifespan and avoid compromising safety.
