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Why is there a noise when releasing the brake during car startup?

2 Answers

OOmar

09/05/25 5:01am

When releasing the brake, there might be a creaking noise, which could be a false fault. If the brake is released too slowly during startup, the engine already has sufficient power to drive the car forward, but the brake hasn't been fully released yet. As a result, the moving wheels are held back by the brake system, naturally causing abnormal noise. It could also be a real fault, where the brake disc and brake pads are stuck together due to rust, leading to abnormal noise. Below are detailed explanations: 1. False fault: This abnormal noise mainly occurs when the brake is released too slowly during startup, a common issue for many automatic transmission car owners. When the brake pedal is released slowly, the engine already has enough power to move the car forward, but the brake isn't fully released, causing the moving wheels to be held by the brake system and producing noise. So next time, remember to release the brake more quickly. 2. Real fault: The brake disc and brake pads are stuck together due to rust, causing abnormal noise. This usually happens after driving in the rain and then leaving the car unused for several days. The brake disc and brake pads rust and stick together, causing noise upon restarting. This can be resolved by applying butter or special lubricating oil to the connection between the brake pads and brake calipers at a repair shop.

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LaAlexis

09/17/25 5:25am

When I first started driving, I noticed a noise every time I released the brake pedal during startup, which really startled me. The mechanic explained that it might be due to rust or dust between the brake pads and rotors causing friction sounds. This happens more often after rain or prolonged parking. For new cars, it's likely just normal break-in noise from components wearing in—no need to worry. But if the noise gets louder or persists constantly, have the brake system checked for issues like loose calipers or severely worn brake pads. Regular maintenance, such as cleaning debris around the brake rotors, can minimize these annoying noises and give you peace of mind while driving.

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