Cummins X15 SCR 2018-2021: OEM 5418532

Effective NOx Reduction for Cummins X15 Engines (2018–2021)

What is it?
The Cummins X15 SCR (Selective Catalytic Reduction) module for 2018–2021 engines, identified by OEM part number 5418532, is an emissions aftertreatment component that helps lower nitrogen oxide (NOx) levels in the exhaust. It works with Diesel Exhaust Fluid (DEF) to trigger a chemical reaction that converts NOx into nitrogen and water before the gases exit the system, contributing to emissions compliance.

Why choose this SCR Assembly?
This SCR unit is engineered to meet Cummins’ original specifications for the X15 engine platform, ensuring proper fitment and dependable integration with DEF injectors, sensors, and control systems. When SCR performance declines—due to wear, contamination, or age—NOx conversion efficiency can drop, potentially causing emissions warnings or inconsistent aftertreatment behavior. Installing the correct OEM-specified component helps maintain stable emissions control and coordinated system performance.

Key Benefits
✅ Designed specifically for Cummins X15 aftertreatment layouts (2018–2021)
✅ Supports dependable reduction of nitrogen oxides with DEF interaction
✅ Promotes coordinated operation with related emissions components
✅ Direct-fit replacement — no alterations required
✅ Built for rigorous exhaust environments and heavy-duty duty cycles

Applications
This SCR assembly is suited for heavy-duty trucks and commercial vehicles equipped with Cummins X15 engines manufactured between 2018 and 2021. It is commonly used in long-haul rigs, regional transport equipment, vocational trucks, and other work vehicles where consistent emissions management and regulatory compliance are essential.

Installation Notes
Ensure the exhaust and aftertreatment system is fully cooled before servicing. Remove the existing SCR module and inspect adjacent DEF lines, sensors, and mounting hardware for wear or soot buildup. Install the replacement SCR assembly using proper seals and fasteners to ensure a secure, leak-free fit. After installation, clear any stored system codes and verify correct SCR performance using diagnostic tools.

Final Thoughts
If your Cummins X15-equipped vehicle is experiencing emissions alerts, inconsistent NOx readings, or uneven aftertreatment behavior, replacing the SCR assembly with the correct OEM-specified unit can help restore reliable emissions control. The Cummins X15 SCR (OEM 5418532) plays a key role in regulating exhaust chemistry and supporting dependable vehicle operation across demanding duty cycles.