Cummins ISX15 SCR Filter 2014-2017: OEM 4377468

Engine-Matched NOx Conversion Component for Cummins ISX15 Engines (2014–2017)

What is it?
The Cummins ISX15 SCR Filter, designed for 2014–2017 model years and identified by OEM part number 4377468, is a selective catalytic reduction component used in the engine’s emissions aftertreatment system. Working in partnership with Diesel Exhaust Fluid (DEF), this SCR filter assists in transforming nitrogen oxides (NOx) in the exhaust into nitrogen and water before the gases exit the tailpipe, helping the vehicle adhere to emissions standards.

Why choose this SCR Filter?
This SCR filter is engineered to match Cummins’ original specifications for ISX15 engines, ensuring proper fit and seamless interface with DEF dosing systems, sensors, and control modules. When an SCR filter becomes restricted or less effective, emissions control efficiency can decline and lead to warning indicators or irregular aftertreatment behavior. Installing the correct OEM-specified filter supports more reliable NOx reduction and consistent aftertreatment responses.

Key Benefits
✅ Designed specifically for Cummins ISX15 aftertreatment systems
✅ Facilitates dependable NOx conversion through DEF interaction
✅ Supports coordinated operation with emissions components
✅ Direct-fit replacement — no alterations required
✅ Built for the demands of heavy-duty exhaust environments

Applications
This SCR filter is ideal for heavy-duty trucks and commercial vehicles equipped with Cummins ISX15 engines from 2014 through 2017. It is well suited for long-haul tractors, regional transport rigs, vocational vehicles, and other equipment where emissions control consistency and reduced regulatory risk are key operational needs.

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

Final Thoughts
If your Cummins ISX15-equipped vehicle is showing NOx-related alerts, inconsistent emissions readings, or uneven aftertreatment responses, replacing the SCR filter with the correct OEM-specified unit can help bring back dependable NOx control and more predictable system behavior. The Cummins ISX15 SCR Filter (OEM 4377468) plays an important role in maintaining emissions system integrity and supporting reliable operation.