Cummins QSM11 Fuel Injector 2003-2009: OEM 4903319RX

Restore Genuine Fuel Control with Cummins OEM Injector

What is it?
The OEM 4903319RX fuel injector is a factory-specified component for Cummins QSM11, ISM11, and M11 engines produced between 2003 and 2009. This high-pressure, common-rail injector delivers fuel precisely to each cylinder, maintaining consistent combustion timing and stable engine response.

Why choose OEM 4903319RX?
Designed to Cummins’ exact specifications, this injector ensures proper spray pattern, flow volume, and electrical calibration. Being a genuine OEM part, it integrates flawlessly with your existing ECM, helping avoid drivability issues or fault codes often caused by poor-fit replacements.

Key benefits
✅ Direct fit for Cummins QSM11, ISM11, and M11 applications
✅ Precision fuel atomization ensures consistent combustion quality
✅ Durable design for high-pressure diesel environments
✅ Factory-programmed solenoid and nozzle for correct operation
✅ Genuine OEM construction backed by Cummins warranty system

Applications
This injector is ideal for heavy‑duty trucks, construction machinery, generators, and industrial equipment powered by Cummins QSM11, ISM11, and M11 engines (2003–2009). It's a proven choice for operators seeking emissions-aware engine function and long-term serviceability.

Installation Notes
Professional installation is recommended. Inspect injector bore and electrical connector before fitting. Use new seals and torque per Cummins guidelines. After installation, clear fault codes and monitor injector balance rates using diagnostic software.

Final Thoughts
The OEM 4903319RX injector offers precise, consistent fuel delivery for Cummins M11‑series engines. Built to factory standards and fully compatible with ECM logic, it helps ensure clean combustion, emission alignment, and long-term reliability.