The most reasonably priced component used on the Civic 2004 (4) 3dr Si (ka) Srs Unit is the Bolt 6x20. Torx Eart.
The Civic 2004 (4) 3dr Si (ka) Srs Unit consists of five pieces with the Unit Assy,srs being the most expensive.
Some items from this specific schematic: Bolt 6x20. Torx Eart, Reel Assy Cable, Unit Assy,srs, Sensor Assy.,r.fr.
