Cummins ISL SCR Filter 2014-2021: OEM 4354062

Targeted NOx Conversion Component for Cummins ISL Engines (2014–2021)

What is it?
The Cummins ISL SCR Filter, covering model years 2014–2021 and identified by OEM part number 4354062, is a selective catalytic reduction component used in the engine’s aftertreatment system. Working in tandem with Diesel Exhaust Fluid (DEF), this SCR filter promotes the reduction of nitrogen oxides (NOx) in the exhaust by supporting the chemical reactions required to convert NOx into harmless nitrogen and water before the gases exit the system.

Why choose this SCR Filter?
This SCR filter is engineered to meet Cummins’ original design specifications for ISL engines, ensuring accurate fit and proper integration with the DEF dosing system, sensors, and control modules. When an SCR filter becomes clogged or less effective over time, its ability to facilitate NOx conversion can decline, potentially triggering emissions alerts or uneven aftertreatment behavior. Choosing the correct OEM-specified filter helps maintain stable emissions system responses and coordinated NOx control.

Key Benefits
✅ Engine-matched design for Cummins ISL aftertreatment systems
✅ Supports effective NOx reduction through SCR chemistry
✅ Helps maintain steady emissions system coordination
✅ Direct-fit replacement — no modifications required
✅ Constructed for dependable service in heavy-duty environments

Applications
This SCR filter is ideal for medium- and heavy-duty trucks and commercial vehicles equipped with Cummins ISL engines produced from 2014 through 2021. It’s well suited for regional haul fleets, vocational units, and other segments where regulated emissions control and consistent aftertreatment behavior are necessary.

Installation Notes
Before servicing, ensure the exhaust and aftertreatment system has fully cooled. Remove the existing SCR filter and inspect surrounding DEF lines, mounting hardware, and sensors for wear or contamination. Install the replacement filter with proper seals and fasteners to ensure secure alignment. After installation, clear any stored codes and verify correct system operation with diagnostic checks.

Final Thoughts
If your Cummins ISL-equipped vehicle is experiencing NOx-related alerts, uneven emissions performance, or irregular aftertreatment behavior, replacing the SCR filter with the correct OEM-specified unit can help restore balanced NOx control. The Cummins ISL SCR Filter (OEM 4354062) plays a key role in maintaining emissions system integrity and supporting reliable vehicle operation.