The component with the lowest price in the 21 REAR SUSPENSION schematic is the Washer, Plain (7g3).
Some items from this specific schematic: Bearing, Bolt, Flange, Rod Connecting 1, Oil Seal (3c11).
This part-list fiche shows all the components that make up the Mt125a 2015 5d7m Europe 1p5d7-300eu 21 Rear Suspension .