Special tools required:

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27 1 450

IMPORTANT: After completion of work, check transmission oil level. See 27 00 ... Replenishing / Changing Transfer Case Oil (ATC 300)
Use only the approved gear oil in this transfer case.

Necessary preliminary tasks:

Remove front propeller shaft.

Lever output flange (1) out of housing with screwdriver (2).

Lever radial shaft seal out of housing with a suitable tool.

IMPORTANT: Do not damage housing.

Fig 1: Identifying Output Flange

Courtesy of BMW OF NORTH AMERICA, INC.

Drive in radial shaft seal with special tool 27 1 450.

Fig 2: Identifying Radial Shaft Seal And Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.