Abstract: A kit for a modular radar system is provided. The kit includes a basic unit with a housing, a top cover and a bottom cover. A first circuit board with a first plug connector is fastened to an underside of the basic unit. The basic unit is subdivided into a first and second cell by partition walls. The first cell includes a radar module and the second cell includes a second circuit board. The top cover has a radome in the area of the first cell. The bottom cover includes a power supply module and a data interface module. The upper side of the bottom cover includes at least one plug connector for connecting to a plug connector on the underside of the first circuit board and to connect the power supply module and the data interface to the processing unit and/or the radar module.