Body Control Module/Gateway Module
WARNING: This page is about a different car, the 2019 Jaguar I-Pace. However, it is still accessible from the selected car via links, so may be relevant.
The Body Control Module/Gateway Module (BCM/GWM) is an interface unit on the Controller Area Network (CAN) bus. Information transfers from one CANbus system to another within the BCM/GWM. The BCM/GWM also contains control components.