Cummins X15, QSX15 SCR Filter 2011-2020: OEM 4376754

Balanced Emissions Conditioning for Cummins X15 & QSX15 Engines (2011–2020)

What is it?
The Cummins X15, QSX15 SCR Filter (2011–2020), identified by OEM part number 4376754, is an emissions aftertreatment component designed for use with Cummins X15 and QSX15 diesel engines manufactured from 2011 through 2020. As part of the Selective Catalytic Reduction (SCR) system, this filter helps condition exhaust gases before they enter the SCR catalyst, where nitrogen oxides (NOx) are chemically reduced using Diesel Exhaust Fluid (DEF).

Why choose this SCR Filter?
This SCR filter is engineered to Cummins’ original specifications for the X15 and QSX15 engine platforms, ensuring a proper fit and dependable integration with DEF metering hardware, sensors, and engine control systems. Over time, soot, ash, and other combustion byproducts can accumulate in the filter, compromising how effectively exhaust gases are prepared for NOx conversion. Using the correct OEM-specified filter helps maintain smoother exhaust conditioning and supports consistent SCR operation.

Key Benefits
✅ Designed for Cummins X15 & QSX15 aftertreatment systems (2011–2020)
✅ Helps prepare exhaust gases for effective NOx conversion
✅ Encourages stable interaction with DEF dosing hardware and emissions sensors
✅ Direct-fit replacement — no modifications required
✅ Built to withstand demanding exhaust environments

Applications
This SCR filter is suitable for heavy-duty trucks and commercial vehicles equipped with Cummins X15 or QSX15 engines built from 2011 through 2020. It’s commonly found in long-haul tractors, regional transport rigs, vocational trucks, and other commercial platforms where regulated emissions control and dependable exhaust behavior are essential.

Installation Notes
Before servicing, allow the exhaust and aftertreatment system to cool completely to avoid burns or component damage. Remove the existing SCR filter and inspect nearby DEF lines, sensor connections, and mounting hardware for signs of soot buildup, wear, or damage. Install the replacement filter using proper seals and clamps to secure a tight, leak-free fit. After installation, clear any stored system codes and verify correct SCR behavior using diagnostic tools.

Final Thoughts
If your Cummins X15 or QSX15-equipped vehicle is showing NOx-related warnings, inconsistent exhaust readings, or uneven aftertreatment performance, replacing the SCR filter with the correct OEM-specified unit can help restore coordinated exhaust conditioning and predictable system performance. The Cummins X15, QSX15 SCR Filter (OEM 4376754) plays a key role in managing regulated exhaust chemistry and supporting reliable engine operation across varied duty cycles.