1) The brake pads and rotors need to wear in
- This is the most common reason for grinding noise from new brakes. As the pads and rotors get to know each other, the friction material on the pads will gradually rub away the smooth surface of the rotors, creating a rougher surface that helps the brakes work effectively. This process usually takes a few hundred miles or so, and the grinding noise should gradually go away as the pads and rotors wear in.
2) Poor quality brake pads
- If you've installed cheap or aftermarket brake pads, there's a chance they're made with inferior materials that will grind against your rotors. This is especially true if the pads are not specifically designed for your vehicle.
3) The rotors are warped or damaged
- Warped or damaged rotors can also cause grinding noise when you apply the brakes. If the rotors are not perfectly flat, they can create a vibration that will cause the pads to grind against them. This can happen if the rotors have been overheated, damaged by debris, or simply worn out over time.
If the grinding noise persists for more than a few hundred miles, it's important to have your brakes checked out by a professional. They can diagnose the problem and make sure that your brakes are safe.
