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What Causes the Squeaking Noise When Releasing the Brake During Startup?

1 Answers

KarterRose

07/29/25 12:37pm

Here are the reasons for the squeaking noise when releasing the brake during startup: 1. Releasing the brake too slowly when starting. When you gradually release the brake pedal, 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 restrained by the brake system, naturally causing a squeaking noise. 2. The brake disc and brake pads are stuck together due to rust, causing the noise. This situation usually occurs after driving in rainy weather and then leaving the car unused for several days. The brake disc and pads rust and stick together, leading to noise when starting the car again. 3. The semi-metallic material of the brake pads. Brake pads contain a large amount of metal fibers, which sometimes form metal particles. These particles can produce a harsh noise when pressing or releasing the brakes. Typically, this noise disappears after driving for a while. If it persists, it may indicate poor manufacturing quality, and it's advisable to replace the brake pads promptly to avoid damaging the brake disc.

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