Essential Emissions Component for Cummins X15 (2018–2021)
What is it?
The Cummins X15 SCR OEM 5418500 is an essential part of your truck’s emissions aftertreatment system that helps reduce nitrogen oxide (NOx) emissions in the exhaust. Working with the diesel exhaust fluid (DEF) system, this SCR assembly assists in transforming harmful exhaust gases into less harmful compounds before they exit the tailpipe, helping your engine comply with emissions requirements and maintain consistent performance.
Why choose OEM 5418500?
This OEM SCR assembly is engineered to match Cummins’ original specifications for X15 engines built between 2018 and 2021. It’s designed for proper fit and seamless integration with your vehicle’s aftertreatment components, helping reduce the risk of emissions-related fault codes, warning lights, and engine derates. Choosing OEM quality ensures compatibility and long-term reliability.
Key Benefits
✅ Designed for Cummins X15 engines (2018–2021)
✅ Supports effective NOx reduction with DEF
✅ Helps minimize emissions warnings and interruptions
✅ Built to withstand high exhaust temperatures and daily use
✅ Direct-fit design for easier installation
Applications
This SCR assembly is ideal for heavy-duty trucks and commercial vehicles powered by Cummins X15 engines from 2018 through 2021. It’s commonly found in long-haul tractors, vocational fleets, and other diesel-powered equipment that demand dependable emissions system performance.
Installation Notes
Before installing, make sure the exhaust system has fully cooled. Inspect adjacent sensors, mounting hardware, and gaskets for wear, and replace any worn components as needed. After installation, check all connections and follow manufacturer guidelines for any system checks or initialization.
Final Thoughts
If your Cummins X15 engine is experiencing emissions-related issues, the OEM 5418500 SCR assembly delivers a reliable replacement. With correct fitment and consistent operation, it helps keep your vehicle compliant and ready for the road. Tamerx has this SCR assembly available and ready to ship.

