27 21 030 Replacing radial shaft seal for front axle output (ATC 400/500 X-Drive)

WARNING: This page is about a different car, the 2010 BMW X3, 2009 BMW X3, 2008 BMW X3, and 2007 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

IMPORTANT: After completion of work check transmission oil level, see 00 11 572 CHANGING OIL IN TRANSFER BOX (ATC 400/500)
Use only the approved gear oil in this transfer box.

Necessary preliminary tasks:

Remove reinforcement plate (E53 only), see 31 10 010 REMOVING AND INSTALLING/REPLACING REINFORCEMENT PLATE .
Remove front propeller shaft, see REMOVAL & INSTALLATION .

Press out output flange (1) with a suitable tool (2) in direction of arrow.

Fig 1: Pressing Out Output Flange With Suitable Tool

G04787545

Courtesy of BMW OF NORTH AMERICA, INC.

Remove protective cap (1) with a screwdriver.

Fig 2: Removing Protective Cap With Screwdriver

G04787546

Courtesy of BMW OF NORTH AMERICA, INC.

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

See illustration.

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

NOTE: Illustration shows E46 drive flange.

Fig 3: Driving A Hole Into Radial Shaft Seal

G04787534

Courtesy of BMW OF NORTH AMERICA, INC.

Screw in special tool 23 0 490.

Drive out radial shaft seal (1) with impact weight (2).

NOTE: Illustration shows E46 drive flange.

Fig 4: Driving Out Radial Shaft Seal With Impact Weight

G04787535

Courtesy of BMW OF NORTH AMERICA, INC.

Drive in radial shaft seal with a suitable special tool.

Special tool for E53 27 1 420

Special tool for E83 27 1 410

Fig 5: Special Tools (27 1 410), (27 1 420) And (27 1 341)

G04787549

Courtesy of BMW OF NORTH AMERICA, INC.

Add final details to vehicle.

Check oil level.

Check transmission for leaks.