Steering wheel shakes or pulsates when braking
Brake pedal pulses or vibrates under your foot
Squealing, scraping, or grinding noises when braking
Visible grooves, scoring, or deep ridges on the rotor surface
Blue spots, heat cracks, or discoloration on the rotors
Brakes feel less effective or stopping distance increases
Vehicle pulls to one side while braking
Brake pedal feels unusually soft, hard, or inconsistent
Rotors are below minimum thickness specification
Excessive rust, pitting, or corrosion on the rotor surface
Brake pads wear unevenly or wear out unusually fast
You feel shuddering at higher speeds during braking
A mechanic measures rotor runout or thickness variation out of spec