How to Deal with Abnormal Noise When Starting and Braking a Car?

[HarleyDella]

Here are the solutions for abnormal noise when starting and braking a car:1. New car or recently replaced brake pads producing abnormal noise: Generally, this occurs because the brake pads and brake discs are brand new and have not undergone a break-in period, leading to unusual sounds. If the noise disappears after some use, it is considered normal.2. Foreign objects between the brake pads and brake discs causing abnormal noise: While driving, sand or small particles may enter between the brake pads and brake discs, sometimes causing friction and noise. Simply remove the foreign objects from the brake system.3. Low temperature causing abnormal noise: A low-frequency noise when braking during a cold start. Due to low temperatures, the rubber components of the chassis suspension become stiff and may work together with the frame, causing vibrations in the brake calipers or suspension system, resulting in low-frequency noise. The noise should disappear after driving for a while and the vehicle warms up.4. Loose or aged suspension or chassis components causing abnormal braking noise: Missing or damaged brake disc fixing screws can also cause abnormal braking noise. Loose or aged components such as shock absorber fixing screws, stabilizer bar rubber bushings, or ball joints may lead to abnormal braking noise while driving. Regularly inspect and replace these parts.5. Brake disc corrosion causing abnormal braking noise: The brake discs and pads may corrode due to water exposure or prolonged parking, especially after prolonged use of the handbrake, causing the brake discs and pads to stick together and produce noise during initial driving. Inspect and replace the brake discs.6. Severely worn brake pads or discs causing abnormal braking noise: Brake pads usually have wear indicators. When the brake pads wear to their limit, the wear indicators will rub against the brake discs, producing abnormal noise. When brake discs wear, due to surface contamination, uneven material density, excessive working temperature, or mismatched installation torque, abnormal noise may occur. Inspect and replace the brake pads or discs.