Cummins original For Cummins QSK19 QSK38 QSK50 Engine, Fuel Injector Y431K05394, 2881089, 0986435902, 2881088, Common Rail Injector Assembly Replacement for OEM Parts original new injector

The Y431K05394 fuel injector is a heavy-duty diesel injector assembly listed for Cummins QSK19 engine service and replacement applications. Also searched as Y 431 K05 394, Y-431-K05-394, F00BJ10006, FO0BJ10006, FOOBJ10006, 4955526, Y431KO5199, Y431K05246, F00BJ00005 and F0OBJ00004, it gives international buyers multiple ways to match injector body markings, previous Cummins references, Bosch-style numbers and reman references during sourcing.

As a fuel injection system component, the injector delivers diesel fuel into the combustion chamber at the correct timing, quantity and spray pattern. Its performance directly influences starting performance, idle quality, smoke level, exhaust temperature, fuel consumption, cylinder balance and power output. This makes correct injector selection important for QSK19 engines operating under high load, long service hours, vibration, mining dust, marine humidity and demanding generator, rail or oilfield duty cycles.

The product is positioned for diesel repair shops, QSK engine rebuilders, generator and marine service teams, mining fleet maintenance, oilfield service companies and construction equipment repair operations. QSK19-related applications include power generation, mining, marine, rail, construction, oil and gas and industrial power. Broader QSK-Series references support category searches only; final fitment should be confirmed using the engine serial number, CPL, ECM type and original injector number. Because some cross numbers may contain O/0 typing or OCR variants, the physically verified marking on the old injector should be checked before shipment.