What are the reasons for brake noise?

[StPiper]

Brake noise occurs due to: 1. When the brake discs rub against each other, they generate some metal powder, which can cause unusual sounds when braking. Such noises from the brake pads are normal phenomena; 2. Brake noise may indicate that the brake pads have worn to their limit, causing the brake warning shim to rub against the brake disc, resulting in a metal-on-metal sound. Solutions for brake noise: 1. Firmly pressing the brakes several times or performing emergency stops in an open area can improve the situation; 2. It is necessary to promptly replace the car's brake pads to prevent potential hazards.

[Archer]

I've been driving for nearly twenty years and have encountered the issue of brake squealing several times. Generally, when brake pads are severely worn, they produce a sharp grinding noise because the metal backing plate comes into direct contact with the rotor, especially during hard braking. Rust or dust on the disc surface can also cause noise, particularly after rain when moisture condenses and causes the discs to rust. Simply driving normally for a while or applying the brakes a few more times will wear off the rust, and the noise will naturally disappear. If the unusual noise persists, it could also be due to insufficient lubrication of the brake caliper's sliding pins, which increases friction and noise. Ignoring such minor issues can affect braking efficiency and even accelerate component wear. I recommend pulling over to inspect the brakes if you hear squealing. If you're unsure, it's best to visit a repair shop for a thorough check to avoid safety hazards. Regular maintenance of the braking system is also crucial; having it inspected every six months can reduce the occurrence of squealing and make driving more reassuring.

[KaiDella]

The sources of brake noise are diverse. I've found the most common is excessively thin brake pads, where the internal warning shim contacts the rotor to produce a high-pitched sound. Warped or uneven rotors can also cause vibration noises, such as from prolonged city driving with frequent braking leading to uneven disc surfaces. Additionally, small stones or debris entering the brake system can get stuck near the caliper, creating squeaking sounds during braking. Insufficient lubrication of caliper slide pins and guide pins increases friction between moving components. Winter condensation accelerates rotor rusting, another frequent noise source. Don't underestimate these sounds—they often indicate potential risks. My experience suggests prompt action upon hearing them: you can preliminarily check for loose parts, but for safety, I recommend immediate professional inspection to ensure consistent braking performance. Regular maintenance, like quarterly brake component cleaning, prevents most noise issues.

[MakaylaDella]

I've only been driving for a little over a year and am particularly sensitive to brake noises. One morning after starting the car, I was startled by a grinding sound from the brakes. After consulting experienced drivers, I learned that this could be due to worn brake pads or rust on the discs, especially in humid conditions during the rainy season. Sharp noises usually indicate that the brake pads are nearly worn out and need immediate replacement; continuous friction sounds might mean there's debris stuck in the system. It's crucial to be cautious when hearing such noises and not ignore them, as they can reduce braking effectiveness or lead to accidents. The lesson I learned as a new driver is: when encountering unusual sounds, check immediately or take the car to a shop. Also, pay attention to road conditions while driving to avoid sudden braking that accelerates wear. This has made me develop a habit of glancing at the tires before every drive to prevent problems before they arise.

[DeLilliana]

In daily family car use, brake noise often serves as a warning signal. Causes include friction sounds from worn and thinning brake pads, abnormal noises from dust accumulation or rust on the discs, and increased friction from insufficient lubrication of caliper components. Especially after long periods of parking, discs are prone to rust, causing noise, which can usually be alleviated by applying the brakes a few times. If the problem persists, it may be necessary to replace the brake pads or clean the system. To prevent issues, I make it a habit to have all family cars serviced every three months to check brake thickness and lubrication status, which reduces noise and ensures safety. When hearing noises, avoid sudden braking; instead, try gentle braking to clear debris, otherwise seek a repair shop. Consistent regular maintenance keeps vehicles free from minor issues, ensuring smoother journeys.