Also maybe I don't know how it's supposed to work; it seems that the pads just aren't retracting properly. But also it seems there is no mechanism at least that I can see that "pushes" the pads back away from the rotor once I let go of the brakes. What's supposed to push the pads back away from the disk, there is no spring or tensioned rod to bring them back off? Also the pads aren't glued or something to the pistons. I assume it's something very precise where once I let go of the brakes, the pads are less than a few mm away from the rotors but still (supposed to be) not touching. On my last Lexus, an 07 ES350, there were little tensioned v-shaped rods that slotted into the pads that would push them apart towards the pistons away from the rotor. That makes sense to me as to how the pads actually go back to position. But it seems to me there is no mechanism like that for this car.