In an auxiliary unit drive for a motor vehicle, having planetary gearing (P), with a sun gear (S) of the planetary gearing (P) connected in a power-transmitting fashion to a first electric machine (EM1), a planet gear carrier (PT) connected in a power-transmitting fashion to an internal combustion engine (VM), and a first ring gear (H1) connected to at least one auxiliary unit (AG), the auxiliary unit drive has two planet gear sets (PR1, PR2) which are rotatably supported by the planet gear carrier (PT), a second ring gear (H2) which can be held still by a first brake (BS), with the first planet gear set (PR1) meshing with the first ring gear (H1) and the sun gear (S), and the second planet gear set (PR2) meshing with the second ring gear (H2) and the first planet gear set (PR1), a first clutch (KVE), by means of which the internal combustion engine (VM) can be coupled to the first electric machine (EM1), and a first overrunning clutch (FVG), by means of which the planet gear carrier (PT) can rotate in only one rotational direction, whereby a high level of efficiency during starting or at low speeds of the internal combustion engine and also during operation of the vehicle by means of the first electric machine (EM1) is achieved.