A carrier assembly of a seat assembly for use in a motor vehicle allows for the efficient installation of the carrier assembly and several seat assembly accessories. The seat assembly has a seat back, a locking frame and a seat cushion. The carrier assembly includes an elongated base member extending along a longitudinal axis. A pair of outer hinge brackets are attached to the ends of the elongated base member. The seat back is pivotally mounted to the outer hinge brackets about a pivot axis that is spaced apart and parallel to said longitudinal axis of the elongated base member. A pair of floor brackets attached to the ends of the elongated base member secures the elongated base member to the floor of the motor vehicle. The carrier assembly is independent of the locking frame and the seat cushion.