What Causes the Squeaking Noise from Brake Pads When the Car is Cold?

[OSadie]

The reasons for squeaking brakes when the car is cold are as follows: 1. If it is a new car, the brake pads and brake discs are still in the break-in period, which may cause a slight hissing noise. This is normal and can be ignored. It usually disappears automatically after a few hundred kilometers. 2. There may be foreign objects between the brake pads and brake discs, such as small particles like sand or small stones that have entered between them, causing a hissing sound. 3. The brake discs and brake pads may be stuck together due to rust, causing noise. This usually happens after driving in the rain and then leaving the car unused for several days. The brake discs and brake pads rust and stick together, resulting in noise when driving again. This is also normal. 4. The brake disc fixing screws may be missing or excessively worn, causing a mismatch with the brake pads and resulting in noise. 5. The brake pads may be nearly worn out, which can cause a screeching sound. If this occurs continuously for several days and the noise becomes louder and more frequent, it usually indicates that the brake pads need to be replaced.