Modular back panel sub-assembly

A motor vehicle seating assembly comprising a lower seat assembly and an upwardly extending seat back assembly, the upwardly extending seat back assembly comprising;

• a seat back frame;
• a seat back cushion and suspension module attached to the seat frame, the seat back cushion and suspension module further comprising a one-piece composite inner carrier substrate having a pair of vertically extending side members, an upper transverse member, and a lower transverse member, wherein an outer edge of each of the side members, upper transverse member, and lower transverse member form an outer perimeter of the one-piece composite inner carrier substrate, and a seat back trim cover having an outer perimeter having a plurality of seat back trim cover attachment fasteners disposed about a perimeter of the seat back trim cover at locations corresponding to a plurality of discrete locations about the outer perimeter of the one-piece composite inner carrier substrate;
• and
• a decorative seat back rear panel module comprising a first seat back rear perimeter panel comprised of an upper transverse member and a pair of opposed vertically extending side members to define an open lower portion and a second seat back rear central panel that define a rear exterior surface of the decorative seat back rear panel module, wherein the second seat back rear central panel comprises a molded substrate having an outer surface and a trim covering disposed against the outer surface of the molded substrate, and the pair of opposed vertically extending side members of the first seat back rear perimeter panel comprises a pair of vertically extending, forward facing, and opposed side edges that each include a plurality of vertically aligned molded-in attachment receptacles, wherein the outer edge of each of the vertically extending members of the one-piece composite inner carrier substrate includes a plurality of vertically aligned molded-in attachment fasteners aligned and corresponding with the attachment receptacles of the decorative seat back rear panel module that are received within and are resiliently secured by the attachment receptacles of the decorative seat back rear panel module when the upwardly extending seat back assembly is assembled.