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

[DeOlivia]

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.

[LaAngelina]

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.

[Jordan]

As an ordinary car owner, I also experienced the annoyance of squeaky brakes when I first got my car. It's mostly caused by dust or small stones stuck between the brake pads and discs, creating noise when they rub against each other. New cars may also have this issue during the break-in period, but it usually fades away over time. Additionally, prolonged parking can lead to rust on the discs, which can also cause noise. I suggest not ignoring it, especially if the noise persists or worsens when braking. You can simply check the thickness of the brake pads yourself—if they're too thin, replace them. Safety comes first, so I drove straight to the repair shop to let the mechanic take a look. It didn’t cost much but saved a lot of hassle. Parking away from muddy areas can also help reduce such problems.

[TaylorLee]

I know a thing or two about cars. Squeaking sounds are usually caused by brake pads being too thin or uneven friction surfaces. When there are foreign objects or rust on the disc, the friction increases, resulting in a sharp noise. Loose spring clips can also cause noise. This situation needs to be checked as soon as possible, otherwise it will affect braking performance. I've personally tried using a small brush to clean off dust, but that's not a long-term solution.

[DiMaria]

The moment I hear squeaky brakes, my heart skips a beat, as this can escalate into a major issue. Most often, it's due to excessively worn brake pads or damaged rotors. At best, it's an annoying noise; at worst, you might not stop in an emergency. My advice is not to take chances—check the brake thickness immediately. If accompanied by vibrations or other abnormalities, it indicates a system problem requiring professional repair. I maintain my car regularly to ensure safety.