Why does the newly replaced brake pad make a squeaking sound?

[DeJohnny]

The reasons for the squeaking sound of newly replaced brake pads: 1. There is noise when braking, but no noise when not braking, which is caused by the wear between the brake pad and the brake disc. The old brake pad and brake disc have formed a complementary shape after long-term use. After replacing with a new brake pad, its edge does not contact the brake disc evenly, resulting in friction noise; 2. The replaced brake pad is not a regular one, and the particles in the brake pad material are large, which easily causes noise when braking; 3. Installation issues, such as not applying lubricating paste (also called soundproof paste, black) or improper installation of the brake pad shim. In this case, reinstallation is sufficient; 4. Check the brake caliper. If it is found that the brake caliper cannot return to its normal position, it should be replaced in time.