How can i tell Which rotor is warped?

To identify a warped rotor, listen for any unusual noises, such as grinding or pulsating, when braking. You can also feel for vibrations in the brake pedal or steering wheel during braking, which may indicate a warped rotor. Additionally, visually inspect the rotors for uneven wear or irregular surfaces. If you suspect warping, it's best to have a professional mechanic confirm the diagnosis and recommend any necessary repairs.