These fuel metering units, 0928400810 and 0928400703 developed by Bosch, are responsible for the regulation of both the pressure and flow of diesel fuel in the common rail injection systems they serve. The usage of these components allows for the normal delivery of diesel fuel, which is necessary for effective combustion and engine operation, reliable starting and steady performance. The 0928400810 finds application in Piaggio Porter of 1.2 D and Porter of 1.2 D Maxxi, while the 0928400703 can be applied to some models of Renault Master III of 2.3 dCi, Renault Trafic of 2.0, and Opel Movano. The said components can be used to replace defective or used fuel metering units, provided the compatibility with the initial specification is checked. Prior to the purchase, it is necessary to ensure the validity of the Bosch part number, vehicle engine model specifications, compatibility of high pressure pump with the connector and installation options.