original Diesel Engine Parts Common Rail Injector 573-4231 for E336D 330D C9 Excavator Replacement OEM  original new injector

The 573-4231 fuel injector is engineered as a direct-fit replacement for C9 and C9 ACERT diesel engine platforms, serving industrial, marine, generator set, and heavy equipment applications. Built to original fuel system specifications, this common rail unit injector delivers consistent high-pressure fuel metering across the full operating range of the C9 engine family, supporting stable idle quality, smooth load transitions, and reliable cold-start performance in demanding field conditions.

Featuring multi-hole nozzle technology and precision-machined internal components, the injector achieves ultra-fine fuel atomization for faster and more complete combustion inside the C9 cylinder. High-pressure resistant body construction and corrosion-resistant materials allow the unit to perform reliably in harsh environments commonly encountered in mining, construction, marine propulsion, and stationary power generation. The design contributes to improved torque output, better fuel economy, lower particulate emissions, and enhanced engine response compared to worn or non-spec replacement injectors.

This injector carries OE reference 573-4231 and is fully interchangeable with part numbers 20R-8846, 20R-8064, 20R-8069, 293-4072, 11R-1582, 387-9432, 387-9435, 267-3360, 328-2574, 557-7637, and 557-7634. It is validated for use on 950H, 962H, 966H, 972H, and 980H equipment powered by C9 engines, making it a versatile solution for fleet maintenance, engine overhaul, and aftermarket replacement programs requiring confirmed C9 series compatibility.