On Autohaus AZ there is two different "Timing Chain Guide/Rail" parts one is $45 and one is $16. It looks like the $16 is the plastic insert for the stock aluminum rail and the $45 is the aluminum rail itself. Correct? I only need the plastic insert?
The two parts you described sit on the insides of the timing chain. The aluminum guide has no insert. That $16 parts sits on the opposite side of the aluminum guide.
http://www.realoem.com/bmw/showparts...85&hg=11&fg=25
'01 540it, 6/01
'03 325i 5 speed, 9/02
'10 535ix. 9/09
'10 mini 6 speed
'15 mini countryman 6 speed