27 21 030 Replacing radial shaft seal for front axle output (ATC 450)

WARNING: This page is about a different variant/trim than selected.

Special tools required:

23 0 490
27 1 470

IMPORTANT: After completion of the repair work, check gearbox oil level . For these transfer boxes, use approved transmission oil only. See TRANSFER CASE - OPERATING FLUIDS .

Necessary preliminary tasks:

Remove front propeller shaft. See 26 20 000 REMOVING AND INSTALLING FRONT PROPELLER SHAFT (N52K, M57T2, N54, N55, N57) .

Remove protective cap (1) with a screwdriver.

Fig 1: Remove Protective Cap (1) With A Screwdriver

Courtesy of BMW OF NORTH AMERICA, INC.

Drive a hole into radial shaft seal (1) using a center punch (2).

IMPORTANT: Do not use a drill as metal chips may result in transmission malfunction.

Fig 2: Drive A Hole Into Radial Shaft Seal

Courtesy of BMW OF NORTH AMERICA, INC.

Screw in special tool 23 0 490. Drive out radial shaft seal (1) with impact weight (2).

Fig 3: Drive Out Radial Shaft Seal (1) With Impact Weight

Courtesy of BMW OF NORTH AMERICA, INC.

Drive in radial shaft seal with special tool 27 1 470.

Fig 4: Drive In Radial Shaft Seal With Special Tool 27 1 470

Courtesy of BMW OF NORTH AMERICA, INC.

Reassemble the vehicle. Check oil level. Check transmission for leaks.