a gearing unit of a motor vehicle actuator , in particular an electric parking brake , includes a gearing housing in which a driven first shaft and a driving second shaft having fixed rotational axes are located . a first toothed wheel is mounted on the first shaft and a second toothed wheel is mounted on the second shaft . the first toothed wheel and the second toothed wheel engage with one another through a third toothed wheel . the housing for the third toothed wheel has at least two spatially offset bearing points in order to adjust a transmission ratio between the first shaft and the second shaft . an electric parking brake having a gearing unit is also provided .