The invention relates to an automobile electrical installation configuration system for automatically configuring the electrical installations in automobiles, comprising hardware components connected at least partially to a data bus network and software components installed in at least part of said hardware components for executing corresponding functions. According to the invention, a central actual configuration data storage is provided, which is mounted on the vehicle side, for retrievable storage of an actual configuration data set characterizing the actual configuration of the corresponding electrical installations of the vehicle, whereby the storage directly or indirectly communicates with all hardware components. The system additionally or alternatively includes a topology configuration system part, a hardware component configuration system part and a vehicle configuration system part, in addition to a graphic user interface for menu-controlled user guidance. The inventive system can be used, for instance, for automatic client-specific configuration of electrical installations in automobiles.