What Causes Abnormal Noises When Braking a Car?
4 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.
As a parent who frequently drives to pick up my kids, strange noises from the brakes can be really nerve-wracking. Common issues include severe brake pad wear causing metal grinding sounds, squeaking noises from rusted brake discs on rainy days, or creaking sounds due to aging caliper components. These abnormal sounds aren't just annoying—they might delay braking response time and increase rear-end collision risks. I remember once hearing strange noises when braking, only to discover it was caused by low brake fluid level. Fortunately, I promptly went to the 4S shop to top it up. My advice is: don't hesitate when you hear abnormal sounds—immediately drive at low speed to a safe spot for inspection. You can first check if the brake warning light is on and whether there's obvious wear on the discs and pads. For prevention, having your brake system checked every six months can avoid such scares.
When I first got my driver's license, my car's brakes always made strange noises, especially squeaking in rainy weather. The mechanic said it was because the new brake pads hadn't been properly worn in or there was grit stuck on the discs, and a light sanding would fix it. Also, when old brake pads are excessively worn, the metal backing plate gets exposed, causing a screeching sound, and they need to be replaced for quiet operation. If the noise is minor, don't panic too much—just drive to the repair shop for a check-up; it won't take much time. You can also occasionally check the brake discs for cracks or rust spots and address them promptly if found. In short, don't ignore it to prevent small issues from becoming big ones.
