The Heater Unit assembly is constructed from several parts from which the Heater Unit Assy is the most expensive.
Some items from this specific schematic: Screw Tapping 5x12, Screw Wash 4x16, Core Comp Heater, Motor Assy A/m.
This part-list fiche shows all the components that make up the Civic 2000 (y) 4dr Dx (ka) Heater Unit .