The lowest price component in this Taillight parts-list fiche is the Bulb, Taillight (12v 21/5w).
Parts such as the Taillight: Reflector, Taillight Unit Assy, Collar (3l1), Screw, Tapping(1ux) are included in the Xp500 2004 5vu1 Norway 1c5vu-300e2 Taillight parts fiche.
This TAILLIGHT assembly utilises four Screw, Tapping(1ux)(s) - the highest specified component.