What Causes Brake Pad Noise in Cars?

[Mildred]

Automobile brake pad noise can be attributed to the following reasons: 1. New car brake noise: Since the brake pads and discs of a new car are in a brand-new state and haven't been worn in, noise may occur. 2. Foreign objects or water film between brake discs and pads: On rainy days, brake pads tend to be damp, making them prone to noise at low speeds. After the vehicle is parked, a slight condensation forms on the surface, causing noise during the first drive the next day. Additionally, foreign objects like sand, small stones, or other particles between the brake pads and discs can also lead to noise. 3. Noise when braking in reverse: The noise occurs during reverse braking due to changes in the friction pattern of the brake pads. 4. Rust on brake discs: The vehicle's brake discs and pads may rust due to driving through water or prolonged parking, especially after long-term use of the handbrake, causing the brake discs and pads to stick together and produce noise during the initial drive. 5. Brake pad wear limit warning sound: When brake pads wear down to their limit, the warning tab will rub against the brake disc, producing a sharp metallic friction sound. It is essential to promptly visit a service station for brake pad inspection or replacement to prevent damage to the brake disc and brake failure.

[DiEden]

After years of driving, I've found that squeaky brake pads are quite a common issue, usually caused by several reasons. First, hard particles or sand stuck on the brake pads can cause squeaking, especially after rain when wheels splash up mud. Second, when brake pads wear too thin, they're prone to produce harsh friction sounds against the rotors as they near the end of their life—prompt replacement is needed to avoid damaging the rotors. Third, improper installation, like when I forgot to apply the anti-squeal paste during a DIY job last time, resulted in noise with every press. Additionally, warped rotors or rust spots, particularly noticeable during cold winter starts, can also cause noise. In such cases, I usually start by washing the car to clean the brake components and see if it helps; if not, I head to a professional mechanic—safety first. Regular brake system checks every six months or 10,000 km to monitor wear can prevent major troubles.

[Aubree]

When repairing cars, it's common for brake pads to make loud noises, which can stem from various causes but are generally related to material quality and installation. New brake pads may squeal if they are of poor quality with hard spots or if inferior components are used during friction. Sometimes, the issue lies with uneven brake disc surfaces, scratches, or thermal deformation, causing inconsistent contact between the pad and disc. Installation errors are also frequent, such as forgetting to apply lubricant to the caliper mounts or installing the pads in the wrong direction. Long periods of inactivity can lead to rust on the brake discs, resulting in temporary noise upon restarting. These issues are not only annoying but can also accelerate wear and even affect braking performance. It's advisable not to ignore the problem; instead, promptly disassemble and inspect the system, replace with original parts, or resurface the discs to ensure calipers are securely fastened and slide smoothly. When selecting components, avoid opting for the cheapest options and prioritize branded products to extend service life.

[LincolnRose]

Last time when I braked while turning, the car suddenly made a squeaking noise which startled me. Later I found out it's actually a common issue. The most frequent cause is worn-out brake pads - when they get too thin, the metal part gets exposed and makes noise against the rotor. It could also be dirty brake discs with dust or rust spots from rain. My car parks outdoors often, and the noise gets louder after humid weather. Another possible reason is improperly installed calipers causing friction noise due to looseness. The sound becomes annoying over time and raises safety concerns, so I took it to the shop for inspection. The mechanic said it's minor - just needed new pads costing about a hundred bucks, much better than waiting for serious damage. I now pay more attention to brake conditions and replace pads promptly for safety.