hey, i think u need to look at the caliper carrier part numbers, caliper part number, the Hub or knucle thing part numbers(when i did the search it was a match for this part), and see if there is overlap in the rear. Even the rotor part number.
RealOem is your friend followed by Google search part #'s & click on images to visually compare. I would search, but i spent earlier this week there looking what it takes to run 330x24 front rotor from the 330i on the front. Ans: just the caliper carrier
