The sub assemblies and components that make up this Heater Blower include this Blower Assy, the most expensive part.
On this parts fiche the Bolt-wash.,6x20 is the most specified component.
The most reasonably priced component used on the Civic Wagon 1989 (k) Wgnwagovan (ka,kl) Heater Blower is the Screw,tapping,4x12.
