33 41... Detaching wheel bearing inner ring from drive flange (drive flange removed)

Special tools required: 

• 33 1 307
• 33 4 400
• 33 4 401
• 33 4 402
• 33 4 403
• 33 4 404
• 33 4 405
• 33 4 406
• 33 4 407
• 81 64 2 155 744
• 81 64 2 155 745
• 81 64 2 155 746

Position special tool 33 1 307 on drive flange.

Select one of the following special tools using the wheel bearing inner ring and insert into special tool 33 4 401 .

33 4 405 for dia. 45 - 51 mm

33 4 406 for dia. 50 - 55 mm

33 4 407 for dia. 55 - 61 mm

Fig 1: Inserting Special Tool Into Special Tool (33 4 401)

Courtesy of BMW OF NORTH AMERICA, INC.

Screw out special tool 33 4 402 until the tapered attachment of the spindle comes into contact with the special tool 33 4 401 .

Position special tool 33 4 401 with the corresponding insert on groove of wheel bearing inner ring.

Compress special tool 33 4 401 with wrenches 33 4 403 and 33 4 404 until the special tool can still be turned in the groove.

Fig 2: Compressing Special Tool 33 4 401 Using Wrenches (33 4 403 And 33 4 404)

Courtesy of BMW OF NORTH AMERICA, INC.

Use hydraulic unit and adapter kits, see BMW Workshop Catalogue. 

• Hydraulic unit - 81 64 2 155 744
• Adapter kit 1 - 81 64 2 155 745
• Adapter kit 2 - 81 64 2 155 746

Fig 3: Identifying Special Tool Assembly On Drive Flange Hub

Courtesy of BMW OF NORTH AMERICA, INC.

• Pressure cylinder of hydraulic unit (1) must be in the initial position.
• Spindle F3 must terminate flush with hydraulic unit (1).
• Assemble special tool, see graphic
• Turn spindle of special tool 33 4 400 as far as it will go.

The following tools are required for detachment, consult graphic for arrangement:

Vehicle components 

Required components 

Detach wheel bearing inner ring from drive flange.