The Oil Pump/oil Filter/oil Pan is made up of components including this Pump-assy-oil which is the most expensive.
The component with the lowest price in the OIL PUMP/OIL FILTER/OIL PAN schematic is the Circlip-type-c,11mm.
Some items from this specific schematic: Bolt,flanged,6x25, Spring,oil Filter, Gear, Oil Pump, 57t, Cover,oil Filter.