Parts such as the Switch: Sw Assy,hazard, Bulb Comp, Bulb Comp, Bulb Comp are included in the Civic 2003 (3) 3dr Si (ka) Switch parts fiche.
The most reasonably priced component used on the Civic 2003 (3) 3dr Si (ka) Switch is the Screw,tapping,3x16.
The most expensive part in this assembly is the Sw Assy R*nh167l*.