Tl* the contact owns a 2011 lexus gx460. the contact stated that the brakes would exhibit a loud squealing sound when depressed. the vehicle was taken to the dealer for diagnostic testing where the technician advised the contact that the rotors would have to be shaved to remove crystallization. the vehicle was repaired but after repairs, the contact stated that the vehicle would hesitate to stop when the brakes were applied. the vehicle was taken back to the dealer twice where the technician installed a clip to the brake system and recommended adding wedges as well. the vehicle was not repaired. the vin was not available. the approximate failure mileage was 6,000.