27 10 730 Replacing transfer box control unit (longitudinal torque module) (ATC 35L)

WARNING: This page does not describe the selected car, but rather 27 other vehicles, including the 2017 BMW M6, 2017 BMW 650i xDrive, 2017 BMW 650i, 2017 BMW 640i xDrive, and 2017 BMW 640i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

IMPORTANT: Before and after replacement, execute the "Repair" service function with the BMW diagnosis system.
READ AND COMPLY WITH NOTES ON PROTECTION AGAINST ELECTROSTATIC DAMAGE (ESD PROTECTION) .

Necessary preliminary work:

Disconnect NEGATIVE BATTERY LEAD
Remove CROSS MEMBER .

Disconnect connector (1).

Release screws (3) and remove transfer box control unit (longitudinal torque module) (2).

Tightening torque 27 10 3AZ .

Installation note:

Replace O-ring.

NOTE: Radial shaft seal of actuator shaft must be replaced as well.

Fig 1: Identifying Transfer Box Control Unit And Connector

G08495706

Courtesy of BMW OF NORTH AMERICA, INC.

Thread special tool 23 0 490 into radial shaft seal (1).

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

Fig 2: Removing Radial Shaft Seal

G08504531

Courtesy of BMW OF NORTH AMERICA, INC.

Push the assembly sleeve 11 1 380 over the actuator shaft.

IMPORTANT: Nonobservance involves a risk of damage to the radial shaft seal.

Fig 3: Identifying Assembly Sleeve (11 1 380)

G08504532

Courtesy of BMW OF NORTH AMERICA, INC.

Slide the new radial shaft seal (1) over the assembly sleeve 11 1 380 onto actuator shaft.

Fig 4: Identifying Assembly Sleeve (11 1 380) And Radial Shaft Seal

G08504533

Courtesy of BMW OF NORTH AMERICA, INC.

Drive radial shaft seal fully home using special tool 11 1 200 and plastic hammer.

Remove the assembly sleeve.

Fig 5: Pressing Radial Shaft Seal Using Special Tool (11 1 200)

G08504534

Courtesy of BMW OF NORTH AMERICA, INC.

After replacement:

CARRY out programming/coding.