Problem
Protruding edge on brake rotor surface
![500x370-rotor3-DeNoiseAI-standard rotor](https://www.advicsaftermarket.com/wp-content/uploads/2022/09/500x370-rotor3-DeNoiseAI-standard.png)
Likely Cause
- Brake rotor shims are not installed
- Brake pad backing plate got in contact with rotor surface due to pad wear
- Rotor is worn out
Solutions
- Check if brake rotor shims are installed
- Check the pad wear
- Check the rotor wear
- Replace the rotor