What sound does it make when rotors are bad?

When rotors are bad, they can produce several different sounds. The most common sound is a grinding or growling noise that occurs when the brake pads rub against the damaged rotor. This noise is usually most noticeable when the brakes are applied at low speeds. In some cases, rotors can also produce a squealing or vibrating noise. These sounds are often caused by uneven wear on the rotor or by a warped rotor. If you hear any of these noises, it is important to have your brakes inspected by a qualified mechanic.