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31 50... Changing front differential oil

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2014 BMW X6, 2013 BMW X6, 2012 BMW X6, 2011 BMW X6, and 2010 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: DANGER OF POISONING  if oil is ingested/absorbed through the skin!
RISK OF INJURY  if oil comes into contact with eyes and skin!
IMPORTANT: Use only the approved front differential oil in this front differential.
Failure to comply with this requirement will result in serious damage to the differential!
NOTE: Only change oil when front differential is at normal operating temperature.

Necessary preliminary tasks: 

Checking/correcting front differential oil level: 

Undo oil filler plug (1).

Check front differential oil level.

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

Installation: 

Replace oil filler plug.

Tightening torque 31 50 2AZ .

Fig 1: Identifying Oil Filler Plug
G04745219Courtesy of BMW OF NORTH AMERICA, INC.

Changing front differential oil: 

Place oil collecting apparatus underneath.

Remove oil drain plug (1).

Drain front differential oil.

Installation: 

Replace oil drain plug.

Tightening torque 31 50 2AZ .

Undo oil filler plug (2).

Pour in front differential oil up to lower edge of opening for oil filler plug (2).

Installation: 

Replace oil filler plug.

Tightening torque 31 50 2AZ .

Fig 2: Identifying Oil Filler And Drain Plug
G04745220Courtesy of BMW OF NORTH AMERICA, INC.