E65 only:
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2005 BMW 745i, 2005 BMW 745Li, 2004 BMW 745i, 2004 BMW 745Li, and 2003 BMW 745i. However, it is still accessible from the selected car via links, so may be relevant.
Release screws (3).
Remove tube (4) with check valve (2).
NOTE:
Do not remove guide tube (5) for oil dipstick.
Installation:
Replace sealing ring on tube (4) and coat with antiseize agent.