The most expensive part in this assembly is the Oil Pump Assy.
The sixteen Ew50 Slider 2002 5jh5 Spain 1a5jh-300s1 Oil Pump component parts are all listed in this schematic.
Parts such as the Oil Pump: Pipe, Oil 2, Gear, Pump Drive, Clip, Gear, Worm Wheel are included in the Ew50 Slider 2002 5jh5 Spain 1a5jh-300s1 Oil Pump parts fiche.