* Misaligned calipers: The calipers may not be properly aligned, which can cause the pads to rub against the rotor unevenly.
* Sticking caliper slide pins: The caliper slide pins may be sticking, which can prevent the pads from moving freely and making even contact with the rotor.
* Bent or warped rotor: A bent or warped rotor can also cause the pads to make uneven contact with the rotor.
Moisture and salt: Brake rotors are made of iron, which is susceptible to rust. If the rotor is exposed to moisture and salt, it can start to rust. This is especially common in areas where there is a lot of snow and ice, as the salt used to melt the snow can get on the rotors and cause them to rust.
Lack of use: If a vehicle is not driven very often, the brake rotors can start to rust. This is because the rotors are not being used to generate heat, which helps to keep them dry and free of rust.
Corrosion from other sources: Brake rotors can also rust due to corrosion from other sources, such as:
* Battery acid: Battery acid can leak onto the rotors and cause them to rust.
* Brake fluid: Brake fluid can also leak onto the rotors and cause them to rust.
* Exhaust gases: Exhaust gases can contain corrosive chemicals that can damage the rotors.
Prevention: There are a few things you can do to prevent your brake rotors from rusting:
* Keep the rotors clean and dry. This is especially important in areas where there is a lot of snow and ice.
* Use a rust inhibitor. There are a number of rust inhibitors available that can help to protect the rotors from rust.
* Drive the vehicle regularly. This will help to generate heat and keep the rotors dry.
