Originally Posted by NPVPositive
Is this rust normal in the outer bearing (or whatever you call it!)? I was a little surprised given I don't live in the snow, etc.
Also noticed that. Just included it in the 1M issues log (http://www.1addicts.com/forums/showthread.php?t=760815
Below is a different subject re your query. Didn't check on my 1M, so this might be normal too for installation/fixing purposes.
Collar nut of your 1M:
Collar nut (BMW part# 33411133785) (picture courtesy of RealOEM.com):
Wheel bearing (source: http://realoem.com/bmw/showparts.do?...31&hg=33&fg=40