What Causes the Squeaking Sound from Car Brake Pads?
2 Answers
There are generally several reasons for the squeaking sound from brake pads: 1. Severe wear of the brake pads. This is usually caused by the brake pads reaching the warning line or being completely worn out, requiring replacement. 2. Noise caused by the material of the brake pads. Harder brake pad materials are more likely to produce this type of sound, while softer materials are less prone to such noise. However, softer materials wear out faster and have a shorter replacement cycle compared to harder brake pads. 3. Improper installation of the braking system causing noise, which requires professional repair.
I often take care of my car myself, and sometimes the brakes make a squealing noise, which worries me a lot. The most common reason is dust or small stones stuck on the brake pads, especially after driving on muddy roads in the rain—foreign objects get caught between the pad and the rotor, causing friction noise. Severe wear on the brake pads can also cause this; if they wear down to the metal wear indicators, they’ll produce a continuous high-pitched screech. Newly replaced brake pads might squeak initially during the break-in period, but the noise should fade after some driving. However, if the noise persists, check if the brake rotors are warped or rusted—driving frequently in mountainous areas can cause the rotors to warp and become uneven. It’s a good idea to clean the brake area briefly during regular car washes and measure the brake pad thickness periodically. If it’s below 3mm, they need replacement. Don’t underestimate this noise—ignoring it can lead to longer braking distances and potential danger at high speeds. It’s best to develop a habit of inspecting the brake system yourself every month—it’s simple and ensures safety.
