Rears are lowered by links and coding.

Replacing upper rear link (same as 4.8isX5 mentioned) fixed my own camber problem.

Outward appearance was fine but when we pulled it, the bushing had deflected inward noticeably. (Found and replaced while doing rear wheel bearings)

Had previously been unable to get rear camber to spec, now it's back in spec.

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04 X5 3.0i auto
03 X5 4.6is