OEM refers to Original Equipment Manufacturers who produce parts for vehicle assembly lines, while OES refers to Original Equipment Suppliers providing replacement parts for aftermarket service networks. Odoo automotive ERP supports OEM operations with complex Bills of Materials, just-in-time delivery scheduling, and strict quality compliance workflows. For OES operations, Odoo ERP for automotive industry manages distribution networks, warranty claims, and service part inventory across multiple warehouses. Odoo automotive manufacturing software handles business models within the same system, coordinating production for assembly lines while managing aftermarket parts distribution.