23 42 508 Replacing pressure sensor GS6S53BZ (SMG)

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Before working on hydraulic system:

Reduce pressure in hydraulic system by means of Service Function in DIS Tester.
Disconnect hydraulic pump relay in electronics box.

Do not reconnect relay for entire duration of repair work

NOTE: After completing work:

Check fluid level in hydraulic system by means of DIS Tester "Service Function" . See 21 53... CHECKING/TOPPING UP FLUID LEVEL IN HYDRAULIC SYSTEM (GS6S37BZ/GS6S53BZ/ SMG) .
Perform "Teach in transmission" service function by means of DIS Tester

Necessary preliminary tasks:

Remove underbody protection

Release screws (1) and remove protective plate.

Tightening torque 23 41 7AZ . See MANUAL TRANSMISSION - TIGHTENING TORQUES .

Fig 1: Identifying Protective Plate Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug and release pressure sensor (2).

Fig 2: Identifying Pressure Sensor (2)

Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque 23 41 10AZ . See MANUAL TRANSMISSION - TIGHTENING TORQUES .

Installation:

Replace sealing ring.

NOTE: After completing work:

Check fluid level in hydraulic system by means of DIS Tester "Service Function" . See 21 53... CHECKING/TOPPING UP FLUID LEVEL IN HYDRAULIC SYSTEM (GS6S37BZ/GS6S53BZ/ SMG) .
Perform "Teach in transmission" service function by means of DIS Tester