Refresh Emissions System Efficiency on Cummins L9 (2018–2021)
What is it?
The Cummins L9 SCR OEM 5418485 is a critical emissions aftertreatment component that helps reduce nitrogen oxide (NOx) pollutants from your diesel engine’s exhaust. Working together with the diesel exhaust fluid (DEF) system, this SCR assembly supports the conversion of exhaust gases into cleaner compounds before they exit the vehicle, helping your engine comply with emissions standards and maintain reliable operation.
Why choose OEM 5418485?
Manufactured to Cummins’ original specifications for L9 engines produced between 2018 and 2021, this SCR assembly offers precise compatibility and dependable integration with your truck’s factory aftertreatment system. Choosing a genuine OEM part like 5418485 helps lower the risk of emissions-related fault codes, warning lights, and engine derates — giving you lasting compatibility and performance you can trust.
Key Benefits
✅ Designed for Cummins L9 engines (2018–2021)
✅ Supports effective NOx reduction with DEF
✅ Helps minimize emissions system alerts and interruptions
✅ Built to handle high exhaust temperatures and everyday use
✅ Direct-fit design for straightforward installation
Applications
This SCR assembly is ideal for on-highway trucks, commercial fleets, and vocational vehicles powered by Cummins L9 engines from 2018–2021. It’s commonly used in delivery rigs, service trucks, and other diesel-powered equipment that require dependable emissions control.
Installation Notes
Before beginning installation, allow the exhaust system to cool completely. Inspect all related sensors, mounting hardware, clamps, and gaskets for wear, replacing 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
If emissions performance concerns arise on your Cummins L9 engine, the OEM 5418485 SCR assembly provides a reliable, factory-aligned replacement solution. Designed for proper fitment and consistent operation, it helps keep your vehicle compliant and ready for the road. Tamerx has this SCR assembly in stock and ready to ship.