Abstract: A modular seat assembly includes a seat frame, a seat assembly, and a mounting assembly. The seat frame is operable to be attached to the vehicle and includes a seat support platform. The seat assembly is arranged on the seat frame and includes a seat back and a seat bottom. The mounting assembly includes a support member coupled to the seat support platform adjacent to an inner side of the seat platform and a protrusion extending away from a lateral side of the seat bottom. The seat bottom is coupled to and is pivotable about the support member between a raised arrangement and a lowered arrangement, and the support member includes a resilient recess operable to receive the protrusion when the seat bottom is in the raised arrangement so as to retain the seat bottom in the raised arrangement.