Steering for a motor vehicle

The invention relates to a steering system for a motor vehicle, in particular with a power assist, with a a ball screw (21) and a ball screw nut (10) having ball screw (20) disposed with multiple threads for guiding one after the other, a row of balls (22, 23) forming bullets , characterized in that the ball screw nut (10) two return channels (24, 25) so that two rows of balls (22, 23) circulate in two separate circuits.