1111 647 0601 1 Pump piston, 1111 640 7111 1 Worm Gear, 9642 003 1440 1 Oil seal 14x20x3.5
Last time U did one, parts were still available, but if you are going in there to repair or replace the pump with a good secondhand unit from an 051 075 076- then I would also replace the shaft O ring...