What Causes Abnormal Noises When Braking a Car?
2 Answers
Abnormal noises during car braking can be caused by various reasons such as new brake pads in the break-in period, metal particles in the brake pads, excessive wear of brake discs and pads, or warped brake discs. Brake noise issues can occur at any time, and understanding the causes can help better diagnose faults and enhance safe driving awareness. Here are some relevant details: 1. New Brake Pads: New cars or recently replaced brake pads may produce similar noises when braking. New brake pads and discs require a break-in period, and such noises are entirely normal during this time. However, if the noise persists after prolonged use, it may indicate a problem. 2. Metal Particles in Brake Pads: Factory-installed brake pads often use semi-metallic or non-full metallic materials. As these materials wear down, unevenly distributed high-hardness metal particles may appear. These particles can cause noise when they come into contact with the brake disc. Such particles can also negatively affect the brake disc. Replacing the brake pads with higher-quality ones can immediately resolve the issue. 3. Excessive Wear of Brake Discs and Pads: Brake discs and pads are high-wear components that experience friction every time the brakes are applied. Over time, they naturally wear out, and excessive wear can lead to abnormal noises. Regular inspection and replacement are essential. Typically, brake pads should be replaced every 60,000 to 80,000 kilometers, while brake discs should be replaced every 100,000 to 120,000 kilometers. 4. Warped Brake Discs: Warped brake discs are another common cause of brake noise. Determining if the brake disc is warped is straightforward: if the car produces abnormal noises and vibrations when braking, it is likely due to a warped brake disc.
I've been driving for over 20 years and have encountered many cases of brake noise. It's usually caused by excessively worn brake pads or small stones stuck in them, and there could also be rust or stains on the brake disc surface, leading to a screeching sound during friction. New brake pads might also squeak when first installed, which is part of the normal break-in process. However, if the noise gets louder or is accompanied by vibration, you should worry about potential brake system issues, such as loose caliper springs or insufficient brake fluid, all of which affect braking performance and can compromise safety in severe cases. I recommend not delaying and heading to a professional auto repair shop for an inspection. Replacing a set of new brake pads only costs a few hundred dollars, which is much better than having an accident. Regularly washing the brake components during car washes can prevent dust buildup and reduce the risk of noise.
