Lengthily video walk through of CCV on M54 in an e39 which I hear is same for the X Replacing the BMW M54 Crankcase Ventilation System, Part 1 of 3 - YouTube

What I found when buying the parts for CCV replace is that there are two kits: normal and cold weather. The cold weather has insulation on he outside.

Also this was posted in these forums few days back:
http://www.xoutpost.com/bmw-sav-foru...-out-here.html


X5SND: from diff vent tube! Duh and thanks for the quick answer!