A vehicle part inventory management system is provided for filling at least part of the vehicle part orders by one vehicle dealer from the inventory of another vehicle dealer. The inventory management system includes an ordered parts data structure for storing ordered parts information; an inventory data structure for storing vehicle part inventory information for a plurality of vehicle dealers; and a dealer assessment module connected to the ordered parts data structure and the inventory data structure, such that the dealer assessment module receives at least one request to fill a vehicle part order and is able to determine a list of potential supplying dealers that have the ordered vehicle part. The inventory management system further includes a dealer interface module that receives the list of potential supplying dealers and is able communicate a request to supply the ordered vehicle part to at least one of the potential supplying dealers. The dealer interface module is also able to update the ordered parts data structure in real-time when the request for the ordered vehicle part is accepted by one of the potential supplying dealers.