The nameplate is fitted to the compressor housing of your turbocharger. The information on this nameplate must be quoted for service and parts support.
1) OEM part number: Part number given to the turbocharger by the vehicle/engine manufacturer.
2) Serial number: The serial number is unique to each single turbocharger. The number refers to the production date, etc.
3) BW part number: Part number given to the turbocharger by BorgWarner (former 3K/Schwitzer part number). This number is the most useful for all service purposes.