00 11 ... Checking/Topping Up Oil Level In Rear Differential

WARNING: This page is about a different car, the 2008 BMW Alpina and 2007 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Risk of damage!
To avoid serious damage to the rear differential, it is essential to use only approved gear oils in the differential. See REAR AXLE - OPERATING FLUIDS .

Undo oil filler plug (1).

Check oil level.

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

Fig 1: Identifying Oil Filler Plug

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Oil filler plug with sealing ring:
Replace sealing ring (1).

Tightening torque. See REAR AXLE - TIGHTENING TORQUES - ALPINA .
Oil filler plug with O-ring:
Replace oil filler plug (2).

Tightening torque. See REAR AXLE - TIGHTENING TORQUES - ALPINA .

Fig 2: Identifying Oil Filler Plug With Sealing Ring And O-Ring
Courtesy of BMW OF NORTH AMERICA, INC.