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Why does the car make a squeaking sound when stepping on the brake?

2 Answers

DeOlivia

07/29/25 5:58am

The reasons for the squeaking sound when stepping on the brake of a car: 1. When the vehicle is stationary, a slight squeaking sound at the pedal position when lightly stepping on the brake is due to the sound from the return spring of the brake light switch on the brake pedal; 2. When the vehicle is driving at low speed, a noticeable squeaking sound when stepping on the brake may be due to a problem with the brake disc. For new cars or after replacing the brake pads, if the brake repeatedly produces a harsh screeching sound, it is mostly because the brake disc surface becomes mirror-like after use. This can be resolved by turning the brake disc on a lathe or grinding it with sandpaper or a grinding wheel. When the car has been parked for a long time, in humid weather, or after rain, some rust or dirt may appear on the brake disc or brake pads. Driving for a while longer or applying butter or special lubricating oil at the connection between the brake pads and the brake caliper can solve the issue.

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LaAngelina

08/12/25 9:29am

I've been driving for over ten years, and squeaky brakes are really not uncommon. The most common cause is when the brake pads are nearly worn out, and you hear the metal scraping against the disc. Normally, the brake system is exposed to the outside, and dust or small stones getting in can also cause noise, especially right after washing the car when there's more moisture and the brake discs rust, making the sound more noticeable. If you've driven through a lot of water, you might temporarily hear squeaking, but that's nothing to worry about. However, if it squeaks continuously every day, it could mean the brake pads are almost worn out or weren't installed properly, and you should get it fixed immediately—don't wait until the braking distance increases and causes an accident. The brake system is crucial for safety. I once delayed fixing it for a few days and ended up almost rear-ending someone because the brakes wouldn't grip properly. Now, I make it a habit to check them every six months.

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