Cummins L9 SCR 2022-2024: OEM 5507882

Optimized NOx Control for Cummins L9 Engines (2022–2024)

What is it?
The Cummins L9 SCR (Selective Catalytic Reduction) assembly, designated by OEM part number 5507882, is an emissions aftertreatment component designed for Cummins L9 diesel engines produced from 2022 through 2024. It works alongside Diesel Exhaust Fluid (DEF) to trigger a chemical process that converts nitrogen oxides (NOx) in the exhaust into nitrogen and water before the gases exit the system, supporting reliable emissions compliance.

Why choose this SCR Assembly?
This SCR unit is engineered to match Cummins’ original specifications for the L9 platform, ensuring accurate fitment and seamless integration with DEF dosing hardware, exhaust sensors, and the engine’s control systems. Over time, SCR components can lose efficiency due to normal use or contamination, potentially reducing NOx conversion effectiveness and leading to emissions warnings or uneven aftertreatment performance. Installing the correct OEM-specified SCR helps maintain stable exhaust treatment and coordinated system behavior.

Key Benefits
✅ Designed specifically for Cummins L9 aftertreatment systems (2022–2024)
✅ Helps sustain consistent NOx conversion with DEF chemistry
✅ Promotes coordinated interaction with associated emissions components
✅ Direct-fit replacement — no alterations required
✅ Built for demanding exhaust environments and extended use

Applications
This SCR assembly is suitable for medium- and heavy-duty trucks and commercial vehicles equipped with Cummins L9 engines manufactured between 2022 and 2024. It’s commonly found in delivery fleets, vocational rigs, regional transport vehicles, and other commercial applications where dependable emissions control and regulatory compliance are critical.

Installation Notes
Before servicing, ensure the exhaust and aftertreatment system has fully cooled. Remove the existing SCR unit and inspect nearby DEF lines, sensors, and mounting hardware for signs of wear, soot buildup, or damage. Install the replacement SCR assembly with appropriate seals and fasteners to achieve a secure, leak-free fit. After installation, clear any stored system codes and verify correct emissions behavior using diagnostic tools.

Final Thoughts
If your Cummins L9-equipped vehicle is experiencing NOx-related alerts, inconsistent emissions readings, or uneven aftertreatment behavior, replacing the SCR module with the correct OEM-specified part can help restore coordinated exhaust treatment and smoother system performance. The Cummins L9 SCR (OEM 5507882) plays a central role in managing regulated exhaust chemistry and supporting reliable vehicle operation across demanding duty cycles.