Necessary preliminary tasks

WARNING: This page is about a different car, the 2012 BMW 328xi, 2011 BMW 328xi, 2010 BMW 328xi, and 2009 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

Remove underbody protection
If necessary, remove exhaust system
Remove heat shield

Checking/correcting transfer case oil level:

Undo oil filler plug (1).

Check transfer case oil level.

If necessary, pour in gear oil up to lower edge of opening for oil filler plug (1).

Installation:

Tightening torque, 27 00 11AZ .

Replace sealing ring.

Fig 1: Identifying Filler Plug

Courtesy of BMW OF NORTH AMERICA, INC.

Changing transfer case oil:

Place oil collecting apparatus underneath.

Remove oil drain plug (1).

Drain and dispose of gear oil.

NOTE: Observe country-specific waste-disposal regulations

Replace sealing ring, screw in oil drain plug (1) and tighten down.

Tightening torque, 27 00 11AZ .

Fig 2: Identifying Oil Drain Plug

Courtesy of BMW OF NORTH AMERICA, INC.

Undo oil filler plug (1).

Pour in gear oil up to lower edge of opening for oil filler plug (1).

Tightening torque, 27 00 11AZ .

Replace sealing ring.

Fig 3: Identifying Filler Plug

Courtesy of BMW OF NORTH AMERICA, INC.