Cummins ISL SCR Filter 2014-2018: OEM 4393714

Restored SCR Performance for Cummins ISL Engines (2014–2018)

What is it?
The Cummins ISL SCR Filter, identified by OEM 4393714, is an emissions aftertreatment component designed for engines produced between 2014 and 2018. This unit is part of the Selective Catalytic Reduction (SCR) system, where Diesel Exhaust Fluid (DEF) is injected into the exhaust stream. As DEF breaks down under heat, it forms ammonia, which reacts within the catalyst to convert nitrogen oxides (NOx) into nitrogen and water vapor before exiting the exhaust.

Why choose this SCR Filter?
SCR components must maintain proper chemical activity and exhaust flow to support emissions control. The OEM 4393714 filter is built for Cummins ISL engines, helping ensure the right conditions for NOx conversion. Over time, exposure to heat, contaminants, and residue can reduce catalyst effectiveness, which may impact emissions performance and trigger system alerts. Replacing the SCR filter helps maintain proper interaction between DEF dosing, sensors, and exhaust flow.

Key Benefits
✅ OEM-matched SCR filter for Cummins ISL engines
✅ Supports conversion of NOx into nitrogen and water vapor
✅ Helps maintain proper exhaust flow through the system
✅ Works alongside DEF dosing and sensor inputs
✅ Direct-fit design for straightforward installation

Applications
This SCR filter is used on diesel engines equipped with the Cummins ISL platform manufactured from 2014 through 2018. These engines are commonly found in commercial trucks, buses, and vocational equipment that rely on integrated aftertreatment systems to manage emissions output.

Installation Notes
Allow the exhaust system to cool fully before beginning service. Remove the existing SCR unit and inspect nearby components such as DEF injectors, sensors, and mounting hardware for buildup or wear. Install the replacement filter using proper seals and fasteners to ensure correct alignment. After installation, clear any stored fault codes and verify proper system operation using diagnostic tools.

Final Thoughts
Maintaining proper SCR function is essential for controlling NOx emissions in diesel engines. The Cummins ISL SCR Filter (OEM 4393714) supports consistent exhaust treatment and helps keep the aftertreatment system operating as intended.