The invention relates to an electric machine (10) and system kits for electric machines (10), in particular for adjusting movable parts in a motor vehicle, comprising a commutator (55) which is arranged on a rotor shaft (20) and which can be connected to a power source in an electrically conductive manner by means of electric brushes (26), said brushes (26) being secured to a brush support component (17) which is directly radially supported on an inner wall (77) of a pole housing (12). The electric machine also of comprises a plug module (16) which has electric conductors (51) for connecting to an outer connection plug (18). The plug module (16) has axial protrusions (82) which engage into corresponding axial recesses (80) in the brush support component (17), wherein the axial protrusions (82) are likewise directly radially supported on the inner wall (77) of the pole housing (12) and not radially on the brush support component (17).