Reinforce Emissions Control on Cummins X15 (2018–2021)
What is it?
The Cummins X15 SCR OEM 5418109 is a key emissions aftertreatment component that helps reduce nitrogen oxide (NOx) pollutants from your diesel engine’s exhaust. Working alongside the diesel exhaust fluid (DEF) system, this SCR assembly assists in converting harmful exhaust gases into cleaner byproducts before they exit the tailpipe, helping your engine meet emissions requirements and run reliably.
Why choose OEM 5418109?
Built to Cummins’ original specifications for X15 engines manufactured from 2018 through 2021, this OEM SCR assembly ensures proper fit and seamless integration with your truck’s factory aftertreatment system. A genuine Cummins-matched component like the 5418109 helps minimize the chance of emissions fault codes, warning lights, and engine derates, giving you dependable compatibility that aligns with your engine’s design.
Key Benefits
✅ Designed for Cummins X15 engines (2018–2021)
✅ Supports effective NOx reduction with DEF
✅ Helps reduce emissions system alerts and interruptions
✅ Durable construction for high exhaust temperatures
✅ Direct-fit design for easier installation
Applications
This SCR assembly is ideal for heavy-duty commercial trucks, long-haul tractors, and vocational vehicles powered by Cummins X15 engines from 2018–2021. It’s commonly used in freight transport, fleet hauling, and regional delivery operations where dependable emissions control is essential.
Installation Notes
Before installation, ensure the exhaust system has fully cooled. Inspect related sensors, clamps, gaskets, and mounting hardware; replace any worn components as needed. After installing the SCR assembly, verify all connections are secure and follow manufacturer-recommended system checks to confirm proper operation.
Final Thoughts
When emissions concerns affect your Cummins X15 engine, the OEM 5418109 SCR assembly delivers a reliable factory-aligned replacement solution. Designed for proper fit and consistent performance, it helps keep your vehicle compliant and ready for the road. Tamerx has this SCR assembly in stock and ready to ship.

