What method is used to detect warping in brake rotors?

Measuring rotor thickness is a reliable method for detecting warping in brake rotors. A warped rotor typically exhibits uneven thickness across its surface. By measuring the thickness at various points around the rotor, a technician can identify any deviations from the manufacturer's specifications. If the thickness varies significantly, it indicates that the rotor is not flat or is warped, which can lead to uneven braking and vibrations when the brakes are applied.

Visual inspection for cracks does not provide specific information about warping, as cracks can occur independently of any warping issues. Checking the brake fluid level is relevant for overall brake system functionality but does not assess the condition of the rotors themselves. Testing brake pedal pressure can indicate a problem with the braking system, but it won't directly reveal issues with rotor flatness. Therefore, measuring rotor thickness is the most effective method for identifying warping in brake rotors.