A window regulator assembly is described that comprises a window bracket that is in contact with the bottom edge of the window; a cable; a carrier plate that is in contact with the window bracket and both ends of the cable; a tension spring located on each end of the cable; an upper bracket assembly; a drum housing having a cable drum; a hollow conduit located between the upper bracket assembly and the drum housing; and a drive unit. The upper bracket assembly, cable drum, and conduit are capable of slideably receiving the cable, while the tension springs provide a predetermined amount of tension to the cable in order for the window regulator assembly to move the window between open and closed positions. Many of the components of the window regulator assembly may be formed from a thermoplastic material.