00 11 259 Replenishing / changing rear differential oil

Failure to comply with this instruction will result in serious damage to the rear differential!

Replenishing rear differential oil: 

Undo oil filler plug (1).

Check rear differential 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: 

1. Oil filler plug with sealing ring:

   Replace sealing ring (1).

   Tightening torque. Refer to 33 11 3AZ.

2. Oil filler plug with O-ring:

   Replace oil filler plug (2).

   Fig 2: Identifying Sealing Ring & Oil Filler Plug

   Courtesy of BMW OF NORTH AMERICA, INC.

Changing rear differential oil: 

Only change oil when rear differential is at normal operating temperature.

Recycling: 

Catch and dispose of emerging differential oil.

Observe country-specific waste-disposal regulations

Place oil collecting apparatus underneath.

Remove oil drain plug (1).

Drain and dispose of differential oil.

Undo oil filler plug (2).

Fig 3: Identifying Oil Drain Plug & Oil Filler Plug

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

1. Oil drain plug with sealing ring:

   Replace sealing ring (1).

2. Oil drain plug with O-ring:

   Replace oil drain plug (2).

   Fig 4: Identifying Sealing Ring & Oil Drain Plug

   Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Pour in rear differential oil up to lower edge of opening for oil filler plug (1). See Fig 5.

Fig 5: Identifying Opening For Oil Filler Plug

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

1. Oil filler plug with sealing ring:

   Replace sealing ring (1).

2. Oil filler plug with O-ring:

   Replace oil filler plug (2).

   Fig 6: Identifying Sealing Ring & Oil Drain Plug

   Courtesy of BMW OF NORTH AMERICA, INC.