What Causes Noise from Newly Replaced Brake Pads?

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Reasons for noise from newly replaced brake pads: 1. Some brake pads contain metal wires or other hard material particles that are relatively large. When the brake pads wear down to these materials, they will make noise against the brake disc, which will stop once they are worn through; 2. Check if there is any foreign object caught between the brake disc and the pad. If the sound is muffled, it is mostly an issue with the brake caliper; 3. The brake pads were not installed with a shim: Generally, brake pads are wrapped with a shim to prevent direct contact between the brake caliper and the brake pad during operation. Without the shim, direct contact can cause collision noises, which is one of the factors leading to noise from newly replaced brake pads; 4. Poor contact between the brake pad and disc: The wear between the brake disc and pad is not uniform, causing the brake disc to become uneven and develop grooves. When new brake pads are installed, their smooth and flat surface may not make full contact with the slightly grooved brake disc, resulting in poor contact. This reduces the contact area between the two, leading to decreased braking performance and noise.