The component with the lowest price in the ENGINE MOUNT schematic is the Nut,lock,10mm.
The sub assemblies and components that make up this Engine Mount include this Bolt,adjust,18x35, the most expensive part.
A sample from the products for the Engine Mount include: Bolt,flanged,10x132, Collar,10.5x26x54, Nut,18mm, Collar,10.5x26x40.