Cummins 4902921 Fuel Injector Assembly

The Cummins 4902921 is a Celect electronic unit injector (EUI) designed for 10.8L and 11L diesel engines including the ISM, ISM11, QSM11, M11, QSM, L10, and MTA11 series. It operates within the Celect fuel system architecture, utilizing a solenoid-actuated nozzle for precise fuel metering and injection timing control. The injector assembly integrates the nozzle, solenoid valve, and hydraulic actuation components into a single unit mounted directly in the cylinder head. This part number supersedes and cross-references 4088384, 4902921PX, 4902921R, 4902921RX, 209961X, 3411753, 3411756, 4903472, and 4061851. The corresponding nozzle component is part number 4902924. Units are available as new genuine, new aftermarket, or remanufactured to OEM specifications with calibration verified by engine serial number (ESN). Applications span heavy-duty on-highway trucks and off-highway construction machinery such as hydraulic excavators and dump trucks.