Not to beat this dead horse, but I changed my LS460 Sport rotors and pads. 1 week of silence. Then I used the HOLD button at a few stoplights. The squeaking is back. Is it possible the HOLD feature is not releasing the brakes fully or something. Pad and rotors were unbelievably cheap from either dealer or Lexusparts. Must have too many on hand.

 

First Lexus replaced pads new shims. Squeaking returned in about 6000 miles. Back to Lexus and this time they replaced pads and rotors 24,000 miles. So far no squeaking, but still get loud grabbing sound from left front. I am begining to think it is a caliper issue. Lexus still has no answer.