What Causes the Clicking Noise and Poor Braking Performance During Emergency Braking?
2 Answers
Here are the specific reasons for the abnormal noise and difficulty in braking during emergency braking: 1. When installing new brake pads, the old brake discs were not resurfaced, resulting in improper fit. Improper installation or failure to resurface the old discs before installing new pads causes the new pads to rub directly against the uneven surface of the old discs, leading to uneven wear on the new brake pads. 2. There may be defects in the braking system itself, causing the brake pads to only partially contact the brake discs. This increases the pressure per unit area during braking, resulting in abnormal noise. It is recommended to check components such as the calipers and guide pins. 3. Foreign objects may be present, causing the contact surfaces to not fit properly and resulting in abnormal noise.
I've been driving for over ten years and have experienced that clunking sound and feeling of not stopping when braking several times. At first, I thought the car was broken and was very worried. Later, I learned that during emergency braking, it's most commonly the ABS anti-lock braking system at work. It rapidly releases and applies the brakes to prevent wheel lock-up, hence the noise and vibration. The feeling of not stopping is actually a normal protective mechanism. However, if this happens every time or there's a strange smell, it's necessary to check whether the brake pads have worn down to the metal layer or if the brake fluid is insufficient, causing the system to respond sluggishly. I recommend checking the brake pad thickness every six months and replacing them if they're thin, which shouldn't cost more than 500 yuan. Safety comes first—don't delay repairs. My experience proves that regular maintenance can prevent accidents.
