Why does the abnormal noise disappear when braking?
4 Answers
The reasons why abnormal noise disappears when braking are as follows: 1. After replacing the original brake pads, noise caused by human factors may be due to improper installation by the mechanic, leading to misalignment. 2. Sudden noise during driving after some time is usually caused by hard objects on the road, such as gravel or metal debris, getting stuck in the brake pads when braking. Such issues can be addressed at a 4S shop. 3. Inconsistent size of the friction blocks in the brake pads. 4. Noise caused by debris falling off or detachment of the friction blocks. 5. Rust in the brake caliper or failure to replace brake fluid for a long time, leading to deteriorated fluid quality and resulting in friction noise.
I've been driving for many years and have encountered similar abnormal noise issues, most of which are related to the braking system. If there's noise while driving but it stops when you brake, it could be due to uneven wear of the brake pads or debris stuck on the brake disc, causing friction noise during driving, which disappears when the brake pressure increases. Loose suspension components like stabilizer bar joints or aging bushings can also cause squeaking noises when the vehicle moves, stopping when the brake changes the body load. Damaged wheel hub bearings may also cause such symptoms, as the noise stops when the wheels are fixed during braking. Don't delay; this is a significant safety hazard. It's recommended to check the brake pad thickness immediately—replace them if they're below 3mm. Also, have the mechanic inspect the suspension and bearings, or you might regret it if something happens on the highway. Regular maintenance is key—check the chassis components at least once a year to avoid such troubles.
As a parent, I take car safety extremely seriously. The abnormal noise you described that disappears when braking is something I've experienced before. It turned out to be an issue with the brake caliper not retracting properly, causing the brake pads to lightly rub against the rotor while driving, which stops when braking. Suspension system problems like loose control arms are also common, causing knocking sounds during movement that stop when braking. This absolutely cannot be ignored - if the brakes were to fail one day, it could be disastrous. I recommend pulling over safely with hazard lights on immediately and doing a quick visual check for any heat or deformation in the brake components. If you don't have professional knowledge, head straight to a repair shop without hesitation. Make it a habit to inspect brake components every 5,000 kilometers. Spending a hundred or so on new pads is worth it to avoid costly emergency repairs and potential danger to your family. Any abnormal noise while driving is a warning light - quick action is key.
I usually enjoy fixing minor issues myself, and this kind of abnormal noise isn't hard to diagnose. If the noise stops when you apply the brakes while driving, it's likely related to the brakes or suspension. Try driving at low speed in a straight line to listen for the source of the noise from the front or rear. After parking, check the brake pad wear condition; replace them if they're too thin. A damaged wheel bearing also causes noise that disappears when braking due to the change in load. Loose suspension joints may creak during movement but go silent when braking. If the caliper is stuck and the brake pads don't retract, friction while driving will naturally cause noise. If unsure, take it to a shop for an undercarriage inspection—it's just a few bucks. Fixing it early saves hassle and effort. Don't let it worsen and affect safety, especially on long trips where it could be more dangerous.
