1. Improper Installation: If the rotors were not installed correctly, it could cause them to rub against the brake pads or other components, resulting in noise.
2. Brake Pad Issues: Damaged, worn, or misaligned brake pads can also create noise when braking. Make sure the brake pads were properly seated and that they are not sticking to the rotors.
3. Caliper Problems: A faulty brake caliper, such as a sticking caliper or worn caliper slide pins, can affect proper brake pad movement and cause noise.
4. Wheel Bearing Issues: Check if there is any play in the wheel bearing. Worn wheel bearings can cause grinding or humming sounds.
5. Loose Bolts and Components: Ensure all bolts, lug nuts, and components related to the brakes and wheels are properly tightened and secure.
6. Foreign Objects: Inspect the area for any foreign objects or debris that may have gotten caught between the rotors and the pads.
7. Faulty Brake Hardware: Check if the brake hardware, such as shims or anti-rattle clips, is properly in place and not causing any interference.
If you are unsure of the cause, it's best to have the vehicle inspected by a qualified mechanic or automotive technician to diagnose the exact issue and ensure safe braking performance.