Transfer Case Electronic Control Unit

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2010 BMW X3, 2009 BMW X3, 2008 BMW X3, 2007 BMW X3, and 2006 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

The transfer case control unit (VGSG) is installed in the X3 on the rear floor panel under the luggage compartment trim. In X5, it is located underneath the rear bench seat on the left. See Fig 1 . The transfer case control unit (VGSG) is on the PT-CAN Bus. VGSG shares information with DSC for overall xDrive control and has diagnostic communication via the OBD connector. See Fig 2 and Fig 3 .

Fig 1: Identifying Transfer Case Electronic Control Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Transfer Case Bus Overview

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 3: Transfer Case Inputs, Processing & Outputs

Courtesy of BMW OF NORTH AMERICA, INC.