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What Causes Abnormal Noise When Braking Hard?

1 Answers

LaZoe

07/30/25 9:36am

Abnormal noise when braking hard may be caused by rust on the brake discs or brake pads, or excessive wear of the brake discs and brake pads. Rust on Brake Discs: After parking for a long time, especially in humid weather or after rain, some rust or dirt may appear on the brake discs or brake pads. This issue can usually be resolved by driving for a while, or by applying butter or specialized lubricating oil to the connection between the brake pads and brake calipers. Rust on New Brake Pads: If there is noise when braking in a new car or after replacing the brake pads, it is because the new brake pads and brake discs need a break-in period. The noise during braking is completely normal. Excessive Wear of Brake Discs and Brake Pads: Brake discs and brake pads are high-wear items. Every time you brake, these two components rub against each other, leading to natural wear over time. When they become excessively worn, abnormal noise will occur. Therefore, regular inspection and replacement are necessary.

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