How to Solve the Problem of Abnormal Noise in New Car Brakes?
3 Answers
Solutions for abnormal noise in new car brake discs: 1. If it's a screeching sound, first check if the brake pads are nearly worn out and the alarm piece is making noise. If they are new pads, check for any foreign objects caught between the brake disc and the pad. 2. If it's a dull sound, it's mostly an issue with the brake caliper, such as worn sliding pins or a fallen spring plate. 3. If it's a hissing sound, there could be multiple issues: the caliper, brake disc, or brake pads might be problematic. If the noise persists, first check for any dragging brakes. Poor caliper resetting can cause prolonged friction between the disc and pad, leading to abnormal noise under certain conditions. Then, check for any foreign objects stuck between the pad and disc. If the pads are new, inspect whether the brake disc has grooves, as localized friction can cause noise. If the disc is fine, consider whether the brake pads are too hard or if the noise-damping shims were installed incorrectly.
I remember my new car's brakes also squeaked at the beginning, probably because the new brake pads and rotors hadn't worn in yet. There might be anti-rust coating or small burrs on the surface when the car leaves the factory, which will disappear after a few days of driving. Don't worry too much, just drive for 300 to 500 kilometers, and try to avoid sudden or hard braking during this period to smooth out the surface. If the noise isn't loud, it will usually go away on its own. Also, check if there's any dust or debris stuck in the brake pads. Last time after washing my car, I cleaned the brake area and it got much better. If the noise persists or gets louder, you should take it to the shop to check if there's any installation issue. New cars are under warranty, so it's quite convenient to get it fixed.
The most common cause of brake noise in new cars is excessively hard brake pad material or uneven rotor surfaces. I've encountered this situation before, and the most hassle-free solution is to go directly to a 4S dealership for inspection. Technicians typically measure brake rotor thickness and surface flatness - if they find minor scoring or deformation, they'll usually replace them for free. When driving normally, try to avoid roads with lots of gravel to prevent debris from getting stuck. My experience shows that gently applying the brakes a few times after starting the car to evenly distribute heat often reduces the noise. Never ignore it - while problems in new cars are rare, if it turns out to be a manufacturing defect, early intervention can prevent future complications.
