23 42 012 Replacing Expansion Tank GS6S53BZ (SMG)

WARNING: This page is about a different car, the 2007 BMW 550i and 2006 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

After completing work:

Check FLUID LEVEL IN HYDRAULIC SYSTEMby means of DIS Tester "Service Function"
Perform "Teach in transmission" service function by means of DIS Tester

Necessary preliminary tasks:

Disconnect battery
Remove underbody protection
Release EXHAUST SYSTEM at front and lower
Remove heat shields
Support transmission and release TRANSMISSION CROSS-MEMBER
Lower transmission

Release screws (1).

Tightening torque 23 41 7AZ . See EXTERNAL GEARSHIFT COMPONENTS for specs.

Remove expansion tank (2) in direction of arrow.

Fig 1: Removing Expansion Tank

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Replace sealing ring.

Moisten sealing ring (1) with Pentosin and push onto tank fitting.

Fig 2: Identifying Sealing Ring

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: After completing work:

Check FLUID LEVEL IN HYDRAULIC SYSTEMby means of DIS Tester "Service Function"
Perform "Teach in transmission" service function by means of DIS Tester