What Causes the Squeaking Sound When Pressing the Car Brakes?
2 Answers
It is normal for a car to produce a squeaking sound when pressing the brakes, which may be caused by the engine starting. Below is a detailed introduction to car brakes: 1. Brakes: Brakes, also known as the braking system, refer to the action of stopping or reducing the speed of moving locomotives, vehicles, other transportation tools, or machinery. The braking device is a mechanical braking mechanism that slows down the speed, also known as a decelerator. 2. Braking System: The braking system consists of a control system, hydraulic system, and power assist system. The control system includes the pedal, handbrake, etc. The hydraulic system is composed of hydraulic oil, brake pump, and hydraulic oil pipes. The power assist system is the vacuum booster pump. The electronic control system consists of the ABS pump, ABS sensors, and ABS computer. The execution system includes the brake caliper, brake pads, and brake disc.
I've been driving for over a decade and often encounter squeaky brakes. The most common cause is severely worn brake pads, especially from frequent braking in city driving. When the metal part of the pad gets exposed and directly scrapes against the brake disc, that squealing sound is truly ear-piercing. Another reason is rust on the brake discs after rain or prolonged parking—stepping on the brakes makes them squeak, but it usually goes away after driving for a while. However, severe cases can grind grooves into the discs. Additionally, dust or small stones getting into the brake system can cause friction noises. Even newly replaced brake pads sometimes squeak until they're properly broken in after a few days. The key is not to ignore any issue, no matter how minor—early inspection can prevent complete brake disc failure, saving on major repair costs and ensuring safety. Personally, I schedule a visit to the repair shop whenever I hear any unusual noises.
