Cummins L9 SCR 2022-2024: OEM 5507876

Engine-Specific NOx Control for Cummins L9 Trucks (2022–2024)

What is it?
The Cummins L9 SCR (Selective Catalytic Reduction) unit, identified by OEM part number 5507876, is a calibrated emissions aftertreatment module for Cummins L9 engines built from 2022 to 2024. This component works with Diesel Exhaust Fluid (DEF) to help convert nitrogen oxides (NOx) in the exhaust into harmless nitrogen and water before the gases exit the system, supporting emissions compliance and smoother exhaust behavior.

Why choose this SCR Assembly?
This SCR module is engineered to match Cummins’ original specifications for the L9 platform, ensuring reliable integration with DEF injectors, sensors, and the engine’s control systems. When an SCR component loses effectiveness—due to age, contamination, or wear—NOx conversion can become inconsistent and may trigger emissions alerts. Installing the correct OEM-specified SCR helps maintain dependable aftertreatment coordination and more predictable exhaust chemistry.

Key Benefits
✅ Designed specifically for Cummins L9 emissions systems (2022–2024)
✅ Promotes dependable nitrogen oxide conversion using DEF
✅ Helps maintain coordinated interaction with other aftertreatment components
✅ Direct-fit replacement — no adjustments required
✅ Built to cope with demanding duty cycles and high exhaust temperatures

Applications
This SCR assembly is ideal for medium- and heavy-duty vehicles powered by Cummins L9 engines manufactured between 2022 and 2024. It’s commonly used in delivery fleets, vocational trucks, regional transport units, and other commercial platforms where consistent emissions control and regulatory compliance are part of everyday operation.

Installation Notes
Before starting service, allow the exhaust and aftertreatment system to cool fully. Remove the existing SCR unit and inspect adjacent DEF lines, sensors, and mounting hardware for signs of wear or buildup. Install the replacement SCR assembly using the correct seals and fasteners to ensure a secure, leak-free fit. After installation, clear any stored fault codes and verify proper SCR system behavior with diagnostic tools.

Final Thoughts
If your Cummins L9-equipped vehicle is showing NOx-related alerts or variations in emissions performance, replacing the SCR assembly with the correct OEM-specified part can help restore balanced aftertreatment function. The Cummins L9 SCR (OEM 5507876) plays a central role in managing regulated exhaust chemistry and supporting reliable vehicle operation.