Brakes- irregular rear pad wear
I just changed the brakes on the wife's 09 G8 GT with 66K on it.
The pads still had some life but I knew it was getting time based upon miles- I had a little light shaking on front so I turned those rotors and it resolved the issue.
I was surprised when I found the right rear inner pad worn almost to the backing plate while the outer on the same wheel had a 1/4" left.
All other wheels had equal pad wear inner and outer.