What are the causes of abnormal noise in car brakes?

[VanAna]

The causes of abnormal noise in car brakes are: 1. During the break-in period of the brake disc; 2. Normal activation of the ABS system; 3. Foreign objects between the brake pads; 4. Rust on the surface of the brake disc; 5. Excessive wear of the brake pads or brake disc; 6. Assembly issues; 7. Problems with new brake pads. The brake is a mechanical braking device that can slow down the speed of the vehicle, also known as a decelerator. The car brake pedal is located below the steering wheel. Pressing the brake pedal causes the brake lever linkage to be pressurized and transmitted to the brake pads on the brake drum, clamping the brake disc to slow down or stop the vehicle. The manual brake of the car is located next to the gear shift, connected to the brake lever.

[MacAvery]

When I drive, the most common reasons for squeaky brakes are either the brake pads being worn too thin or small stones getting stuck. In summer, high temperatures cause the brake discs to expand from heat, or in winter, rust forms after rain, making the contact surface uneven and leading to unusual noises. My car had this issue last year, and a friend mentioned it could also be due to uneven friction from low-quality brake pad materials or temporary noise caused by water seeping in during car washing. If the sound is only slight during initial driving, it might be a break-in period issue; but if it persists, it should be addressed. Promptly cleaning the brake discs or replacing components can solve the problem. I’ve always believed regular maintenance is crucial—otherwise, accelerated wear could compromise safety. Last time I got it checked, the mechanic found the caliper was a bit tight, and after adjustment, the noise disappeared. Now, I make sure to avoid sudden braking on dusty roads to reduce the chances of squeaking.

[Londyn]

My car's brakes have been squealing a lot recently, most likely due to a brake system issue. For example, newly replaced brake pads need a break-in period, or the brake disc surface might be contaminated with oil or rust. I previously modified my brakes, but improper installation led to increased metal-on-metal friction. Additionally, the ABS system may trigger its protective mechanism on slippery roads, potentially causing momentary unusual noises. In such cases, I usually first check if the tires have accumulated too much dust, then try spraying some cleaner myself. If the noise disappears, it's fine, but persistent squealing means an immediate trip to a professional repair shop to avoid delays that could lead to accidents. After all, brake issues are no small matter—safety first.

[LaKevin]

Having driven for decades, I've seen plenty of brake noises. The main causes are nothing more than worn-out brake pads, warped rotors, or embedded debris. On rainy or cold days, dampness causes uneven friction between discs and pads, leading to squeaks. Some cheap aftermarket parts have poor quality and incorrect friction coefficients, producing even worse sounds. I remember when I was younger and took long trips, grooves on the rotor surface caused sharp screeching. It's crucial to replace them with OEM parts promptly and have a reliable mechanic adjust the caliper springs. Don't ignore it—delaying could increase stopping distance and create hazards. Simple cleaning and lubrication may offer temporary relief, but they're not permanent solutions.