What Causes Friction Noise When Not Pressing the Brake?

1 Answers
StNoah
07/30/25 7:03am
Friction noise when not pressing the brake could be caused by stiffness between the brake disc and brake pads, which can be resolved by adjusting at a repair shop. The noise may also be related to the hardness of the brake pads, primarily due to excessively hard friction material in the pads. This can be addressed by sanding the brake pads with coarse sandpaper. More details are as follows: 1. Apart from potential issues with the brake pads, the brake disc should also be inspected. Foreign objects between the pad and disc, or grooves on the brake disc causing localized friction, can also lead to abnormal noise, though such brake noise is usually intermittent. 2. Another more serious situation could be significant wear on the brake pads or brake disc, which should be replaced promptly to avoid severe consequences. Brake pads should generally be replaced when their thickness falls below 2mm. 3. Additionally, during rainy or snowy weather, when braking over speed bumps, or during emergency braking, a rhythmic "clicking" noise resembling gunfire may occur, accompanied by strong vibrations in the brake pedal. This indicates that the vehicle's ABS (Anti-lock Braking System) has been triggered, causing the brake noise. In such cases, there is no need for concern, and normal driving can continue.
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