Just throwing this out here as it seems to defy all logic, I’m replacing both calipers, pads, and rotors, so this will likely be remedied but I’m hoping someone can offer insight to the cause as it’s driving me crazy. 2000 WJ 4.7L with ATE/Teves type calipers. As you can see in pictures, 2 identical grooves in both front rotors, inside pads, and pads are worn with ridges in pads where rotor grooves are. Ungrooved parts of rotor are rusted as if the pads and rotors are not touching there, so they are only touching in the grooves. My only hypothesis is that I have defective inside pads that have hard spots causing the pads to not wear on the hard spots and just cut grooves there. What do you all think?