Why is there a noise when braking the car?
2 Answers
It may be related to brake pad wear. Brake pads are consumable items, so they will gradually wear thin during vehicle use. When the friction layer is nearly depleted, there is a warning device at the edge of the brake pad, known as the brake pad wear indicator. At this point, the wear indicator will rub against the brake disc, producing a sharp metal friction sound as a warning to remind the driver to replace the brake pads. The maintenance of the braking system is as follows: 1. Replace brake pads: The braking performance of a vehicle is ultimately determined by the brake pads, so maintaining the good condition of the brake pads is the most direct method of brake system maintenance. Brake pads and brake discs (or drums) have a service life and must be replaced when they wear down to a certain extent. 2. Regularly replace brake fluid: Brake fluid is another critical component of the braking system, second only to the brake pads. The key to brake fluid maintenance is ensuring it does not deteriorate, particularly by preventing moisture ingress. Brake fluid should be replaced every 50,000 kilometers, or more frequently if driving in humid conditions for extended periods. 3. Brake adjustment: If the car noticeably pulls to the left or right when braking, this is due to uneven braking between the front wheels, which can easily lead to accidents, especially at high speeds. Immediate brake adjustment at a repair shop is necessary. 4. New car brake break-in: New cars have a break-in period during initial use, and part of this involves the brake system. The first 1,000 kilometers are crucial for the break-in of a new car, and the brake system also needs this period. It is best to avoid emergency braking during this time.
I've been driving for over twenty years and am quite familiar with brake noises. Common causes include worn-out brake pads becoming thin, which can produce sharp squealing sounds, especially during rainy days or cold starts when rust-induced creaking is likely. Sometimes, small stones get stuck in the brake disc gaps, causing a squeaking noise when braking. These situations can all affect driving safety, so when the noise is loud, it's best to pull over and inspect or visit a repair shop to check the brake pad thickness and disc surface. I recommend having a mechanic inspect the brake system during regular maintenance, checking for wear every 10,000 to 20,000 kilometers on average to avoid sudden failure during long-distance driving. Preventive measures include avoiding sudden braking and keeping the wheels clean to reduce the risk of foreign object intrusion.
