Parts such as the Oil Pump: Clamp (6e5), O-ring(6r0), Joint, Link, Hose (l330) are included in the 115/130 Etd 1990 Oil Pump parts fiche.
With a quantity of sixteen pieces, the Clip (6e5) is the most used part in the OIL PUMP diagram.
The component with the lowest price in the OIL PUMP schematic is the Clamp (6e5).