An interchange part number is a unique identifier assigned to a specific automotive part. It provides the ability to cross reference different manufacturers’ parts and allows for easy identification of compatible components. An interchange part number can be found on many products, such as brake pads, filters, spark plugs and more. This type of number allows mechanics and other automotive professionals to quickly identify replacement parts without having to search through each manufacturer's catalog or look up old records from when the vehicle was first sold. Interchange part numbers are also used in some auto-body shops when ordering paint or bodywork supplies, making it easier for them to get exactly what they need in one order instead of searching multiple suppliers for all their needs.