K-CAN System/Peripherals: Notes
WARNING: This page does not describe the selected car, but rather 59 other vehicles, including the 2009 BMW M5, 2009 BMW 650i, 2009 BMW 550i, 2008 BMW M5, and 2008 BMW 760Li. However, it is still accessible from the selected car via links, so may be relevant.
The subdivision of the K-CAN into the sections "SYSTEM" and "PERIPHERALS" relieves the load on the bus because the number of vehicle components (control units/modules) is divided between two "independent" bus systems.