The Srs Unit assembly is constructed from several parts from which the Unit Assy Srs is the most expensive.
Some items from this specific schematic: Sensor, Side Impact, Reel Assy,cable, Unit Assy Srs, Bolt 6x20. Torx Eart.
Of all the components that make up this Srs Unit the Bolt 6x20. Torx Eart has the lowest price.