Why does a new car's brakes make a squeaking sound?
3 Answers
New car brakes making a squeaking sound is due to the friction between the brake pads and discs during the wear-in period. This noise will disappear after some driving as the parts properly seat, which is completely normal. Common causes of brake noise include: 1. Break-in period for new cars - Brake pad bedding is an important process, typically requiring several hundred kilometers before optimal braking performance is achieved; 2. Newly replaced brake pads also need to wear in to properly match with old rotors; 3. Tiny particles may get between pads and rotors during driving, causing noise through friction; 4. Missing or damaged brake rotor mounting screws; 5. Malfunctions in the brake system.
After buying my new car, the brakes often squeaked, which really worried me at first, thinking there might be a serious problem. This could be because the brake pads are still in the break-in period. When new cars leave the factory, the surfaces of the brake discs and pads have some rough particles that can make noise when rubbing together. After driving a few hundred kilometers, the noise gradually disappeared. If the noise persists, check if there is dust or small stones stuck on the brake discs, and gently shake the wheels a few times after parking. It's recommended not to brake too hard during the first month of driving a new car, giving it more time to break in. The braking system is crucial for safety, so it's best to have it checked regularly at the 4S shop and ask for professional advice. They usually say there's no need to worry, as it's mostly a normal phenomenon.
I often research car issues, especially braking systems. Squeaky brakes on new cars are quite common, mostly due to uneven bedding-in of new brake pad and rotor materials. Sometimes after rain when it's damp, moisture seeps into the friction points, making the noise more noticeable. I've tested my own car and found the squeaking is more easily detected during slow driving or light braking. This isn't a major issue, but if the sound persists for over a week, you should check for foreign objects caught between the pads or misalignment. I recommend gentle driving to help with bedding-in and avoiding long-term parking where dust accumulates. You can check wheel hub cleanliness yourself, but don't attempt disassembly or repairs. This also relates to driving habits - smooth operation reduces noise.
