31 50 ... Changing front differential oil

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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:

Remove reinforcement plate, see 31 10 010 Removing and installing/replacing reinforcement plate .

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 sealing ring.

Tightening torque: 31 50 8AZ, see 31 50 FRONT AXLE DIFFERENTIAL .

Fig 1: Front Differential Oil Filler Plug

Courtesy of BMW OF NORTH AMERICA, INC.

Changing front differential oil:

Place oil collecting apparatus underneath.

Remove oil drain plug (1).

Drain front differential oil.

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

Tightening torque: 31 50 8AZ, see 31 50 FRONT AXLE DIFFERENTIAL .

Undo oil filler plug (2).

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

Fig 2: Front Differential Oil Filler And Drain Plug

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace sealing ring.

Tightening torque: 31 50 8AZ, see 31 50 FRONT AXLE DIFFERENTIAL .