Radial shaft seal (1) must not be reused in this case!

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Fig 1: Identifying Radial Shaft Seal And Support Sleeve

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: The sealing lip of the radial shaft seal (1) is highly sensitive and must not be kinked under any circumstances.
Do not touch the sealing lip with your fingers.

Remove support sleeve (2) from radial shaft seal (1).

Fit radial shaft seal (1) on lower gear case cover.

Fig 2: Identifying Radial Shaft Seal On Lower Gear Case Cover

Courtesy of BMW OF NORTH AMERICA, INC.

Using special tool 11 9 420 and central bolt (3), screw radial shaft seal into lower gear case cover until flush.

Fig 3: Identifying Special Tool And Central Bolt

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.