Cummins X15 SCR 2018-2024: OEM 5418541

Advanced NOx Control for Cummins X15 Engines (2018–2024)

What is it?
The Cummins X15 SCR (Selective Catalytic Reduction) unit, identified by OEM part number 5418541, is a core emissions aftertreatment component designed for Cummins X15 diesel engines produced between 2018 and 2024. It works in partnership with Diesel Exhaust Fluid (DEF) to help reduce nitrogen oxides (NOx) in the engine’s exhaust by facilitating a chemical reaction that transforms NOx into nitrogen and water before the gases leave the system.

Why choose this SCR Assembly?
This SCR module is engineered to match Cummins’ original specifications for the X15 platform, ensuring precise fitment and reliable interaction with DEF delivery systems, exhaust sensors, and engine control functions. When SCR components lose efficiency due to wear, contamination, or extended use, NOx conversion effectiveness can diminish, potentially triggering emissions alerts or inconsistent aftertreatment performance. Installing the correct OEM-specified SCR helps support stable emissions control behavior.

Key Benefits
✅ Designed specifically for Cummins X15 emissions systems (2018–2024)
✅ Helps sustain effective NOx reduction via DEF chemistry
✅ Promotes coordinated operation with other aftertreatment parts
✅ Direct-fit replacement — no modifications required
✅ Built for demanding exhaust temperatures and heavy-duty duty cycles

Applications
This SCR assembly is suited for medium- and heavy-duty trucks and commercial vehicles equipped with Cummins X15 engines manufactured between 2018 and 2024. It fits long-haul tractors, regional transport rigs, vocational vehicles, and other commercial platforms where controlled emissions behavior is essential for operation and compliance.

Installation Notes
Before servicing, allow the exhaust and aftertreatment system to fully cool. Remove the existing SCR module and inspect nearby DEF lines, sensors, and mounting hardware for wear, soot buildup, or damage. Install the replacement SCR assembly using the proper seals and fasteners to ensure a secure, leak-free fit. After installation, clear any stored system codes and confirm correct SCR function using diagnostic tools.

Final Thoughts
If your Cummins X15-equipped vehicle is experiencing emissions system alerts, inconsistent NOx control, or irregular exhaust behavior, replacing the SCR assembly with the correct OEM-specified part can help restore balanced aftertreatment performance. The Cummins X15 SCR (OEM 5418541) plays an important role in managing regulated exhaust chemistry and supporting dependable vehicle operation across varied duty cycles.