Yup, at 150t you might want to have a look at your rear subframe bushings as well.

Wear on the inside is negative camber and/or toe and on mine the gradual increase in negative camber was caused by the upper wishbone's bushing. That and the upper locating link are the first to wear out in my tech's opinion. Upper locating link determines toe

When I replaced the upper wishbone assy, it's bushing was obviously compressed and probably causing the increase in negative camber.

__________________
04 X5 3.0i auto
03 X5 4.6is