Why is there noise from the newly replaced brake pads?
2 Answers
There is a break-in period required between the brake pads and brake discs, which usually takes about 500 kilometers to complete. The brake discs may have been worn unevenly by the old brake pads, while the new brake pads have a smooth surface. Therefore, when first installed, the contact area is small and requires break-in. It is normal to hear noise before the break-in is complete. The details are as follows: 1. The causes of abnormal noise from car brake pads include: excessively hard brake pads, excessive wear of the brake pads, excessive wear of the brake discs or drums, rusted brake calipers, slow return of the master cylinder, etc. 2. If the brake pads are new, check if there are any foreign objects caught between the brake disc and pads. If the noise is a dull sound, it is likely an issue with the brake caliper, such as a fallen spring clip. If the noise is a squealing sound, there could be multiple issues, including problems with the caliper, brake disc, or brake pads.
I also experienced noise when I just changed the brake pads, which is actually quite common. The surface of new brake pads is often rough and needs a break-in period. Driving for about 200-300 kilometers can smooth them out. During installation, the gap might not have been adjusted properly, or the caliper sliding pins might lack lubrication, causing excessive friction and noise. Dust or small stones getting stuck can also create noise. My advice is not to worry too much at first. Drive normally and apply the brakes gently several times to allow for natural break-in. If the noise persists or becomes harsh, go back to the shop immediately and have a technician check it out—don’t compromise safety. Regular maintenance can also help reduce such minor issues, with caliper inspection and lubrication being key points.