What Causes Brake Pad Friction Noise?
2 Answers
Disc brakes produce friction noise due to reasons such as the brake pads being in the break-in period, the presence of metal particles in the brake pads, excessive wear of the brake discs and pads, or deformation of the brake discs. Solutions for disc brake friction noise: Remove the brake pads and sand off the rust layer, or replace the brake pads if they are severely worn; have the work done at a professional auto repair shop. For safety, timely maintenance is essential as the braking system directly affects vehicle safety and is a high-wear component. Regular maintenance checks and part replacements are recommended—brake pads typically need replacement every 60,000 to 80,000 kilometers, and brake discs every 100,000 to 120,000 kilometers. The function of brakes is to reduce speed or bring the vehicle to a stop. The working principle involves converting the kinetic energy of the moving vehicle into heat energy through friction between the brake pads and brake drum, as well as between the tires and the ground. Disc brakes consist of a brake disc connected to the wheel and a brake caliper at the disc's edge. During braking, high-pressure brake fluid pushes the brake pads to clamp the disc, creating the braking effect. Disc brakes are also known as rotor brakes and come in two types: standard disc brakes and ventilated disc brakes.
I've encountered the issue of brake pads making squeaking noises several times while driving, which is quite annoying. The most common cause is when the brake pads are worn thin and need to be replaced. Alternatively, if the brake discs are uneven, scratched, or grooved, they can produce squeaking sounds when rubbing. Sometimes, foreign objects like small stones or dust get stuck between the brake pads and discs, causing noise. Loose or rusted calipers, as well as improper installation, can also be culprits. I've learned that this issue shouldn't be ignored because continuing to drive may accelerate component wear and even pose a risk of brake failure. I recommend getting it checked at a 4S shop or repair shop as soon as you hear the noise—safety first. Additionally, regular maintenance of the brake system is crucial to prevent such issues.
