The invention relates to a device for controlling the braking and/or steering and/or acceleration in a motor vehicle, wherein the device has a number of different sensor components, two diverse sensor fusion components, a man/machine interface component and a preferably intelligent actuator controller component, wherein each of these components constitutes a fault-containment unit and has a TTEthernet communications interface, and wherein all components are connected to a central TTEthernet message distribution unit, and wherein the components communicate with one another exclusively with use of standardized Ethernet messages, and wherein a diagnosis unit for time-correct monitoring of the exchanged messages can be connected to the TTEthernet message distribution unit.