What Causes Brake Noise in New Cars?
2 Answers
The causes of brake noise in new cars are as follows: 1. Brake break-in: New cars or recently replaced brake discs and pads require a break-in period, during which some noise is inevitable. Therefore, they need to be worn in, which can result in brake noise, including vibration friction and sharp squealing sounds. 2. Normal activation of the ABS system: During emergency braking, the brake pedal may produce a continuous "thudding" sound, sometimes accompanied by a pulsating sensation. This indicates that the ABS system is activated, which is a normal sound. In this case, simply press the brake pedal firmly to the floor, but this applies only to vehicles equipped with an ABS system. 3. Metal hard spots in brake pads: Brake pads may contain small metal particles that produce sharp, piercing noises when lightly braking. This issue can be addressed by forcefully applying the brakes several times, removing and regrinding the brake pads, or replacing them with higher-quality ones.
I recently bought a new car, and the brakes keep squeaking when I brake. At first, I was really worried. Later, I learned that this is quite common in new cars—it’s mostly the sound of the brake pads during the break-in period. New brake pads have a thin protective coating, and during the first few hundred kilometers, friction can produce high-frequency noise, which usually disappears after a few days of driving. Also, if the car sits overnight in humid weather, the brake discs can rust, causing some noise when braking initially—this isn’t a defect. Of course, if the noise is unusually loud, like metal scraping, or accompanied by brake vibration, it might be due to small debris like a pebble stuck in the system, requiring a car wash or wheel inspection. Within the new car warranty period, such issues are handled for free, but don’t rush to replace parts—most minor problems resolve themselves. I recommend braking gently during the break-in period to help the process; hard braking can prolong the noise phase. Safety first—occasionally check the brake fluid level to ensure the system runs smoothly.
