Any updates on this? I have the same issue. I have examined the strut guide mounts and they appear to be perfectly fine. No major wear. I have a 08 328i with 49k on it.
I even greased the bearings to see if that would help. I have not examined the control arms first hand, but was told by a mechanic that all the bushings look fine.
Lastly, I am beginning to think this is related to the steering and not the suspension. Any ideas on what would make a click sound while turning to the left from a complete stop?