A child car seat subframe that is easily disassembled into component sections for washing within a residential-sized dishwasher. The car seat subframe can be disassembled by hand, and each individual component is capable of fitting in a residential-sized dishwasher individually and collectively. The component sections are attached by a combination of registration tabs and slots, and held tightly together by fasteners, or attached by a combination of tongue and groove joints. Hanging devices, such as hooks, may be formed on one side of each component section to facilitate hanging on racks in a dishwasher. The car seat subframe back panel and side panels are disassembled into a plurality of segments for easily fitting in a dishwasher.