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) Rotor surface problems present themselves as a vibrating wheel or brake pedal. Grinding or growling noises mean that the brake pads have entirely worn away. Annual brake inspections should uncover any issues before they become critical. (Twice yearly brake inspections are recommended if you do any heavy towing or hauling. ) At inspection, make sure to ask your brake repair technician to relubricate your metal on metal components and check the overall condition of your brake fluid.