An adjustment mechanism for a motor vehicle seat includes an annular motor with an inner nut housed in a rotor, a bracket attached to the seat, the annular motor being positioned in the bracket, and a lead screw that is threaded through the inner nut. When the annular motor is activated the rotor as well as the inner nut rotate about the lead screw resulting in relative translational motion of the bracket and hence the seat relative to the lead screw.