What Causes the High-Pitched Noise When Braking a Car?
2 Answers
The causes of high-pitched noise when braking a car depend on the vehicle's mileage and the wear level of brake pads and discs. For new cars, it might be due to hard spots on the brake pads, and the noise will disappear after these spots are worn down. For older cars or those with heavily used braking systems, the noise could result from excessively thin brake pads causing direct friction between the brake disc and caliper, which is dangerous and requires immediate replacement. Alternatively, it might be caused by a warped brake disc. The car braking system, also known as the car's deceleration system, refers to the specialized braking mechanism installed in vehicles to ensure safe driving technically and improve average speed.
A few days ago, I also encountered the problem of squeaking when braking, which worried me for a while. From what I understand, the most common cause is that the brake pads have worn down to their limit. There's a small metal piece designed to alert you when it's time for a replacement, and when it gets thin, it produces a harsh scraping sound. Another possibility is the accumulation of dust, rust, or small stones on the brake discs, especially after parking in the rain, as moisture can cause severe metal rusting, leading to squeaking when braking. Additionally, if the brake pads are made of hard material or of poor quality, they can also generate noise. From a safety perspective, this noise may indicate reduced braking system efficiency, resulting in longer braking distances in emergencies, which is very dangerous. I suggest not taking such situations lightly and recommend getting a thorough inspection at a professional auto shop as soon as possible. Regular maintenance of brake components can effectively prevent these issues.
