Why does the car make noise when releasing the brake at startup?

[VonPeter]

There are several reasons for abnormal noise when releasing the brake at car startup: 1. For automatic transmission cars, the noise is caused by releasing the brake too slowly, resulting in a squeaking sound when starting. 2. The brake disc and brake pads are stuck together due to rust, causing noise. This usually happens after driving in rainy weather or after the car has been parked for a long time. The rust causes the brake disc and brake pads to stick together, leading to noise when starting the car again. This issue can be resolved by applying butter or special lubricating oil at the connection between the brake pads and the brake caliper. 3. Due to low temperatures, the rubber parts of the suspension become harder, and the surfaces of the brake disc and brake pads may also change, causing noise at startup. The noise will disappear after the car warms up. 4. Both the brake disc and brake pads are high-wear items. Each time the brakes are applied, these two components rub against each other, leading to natural wear over time. When the wear becomes excessive, noise will naturally occur, so regular inspection and replacement are necessary.