Cummins L9 SCR 2022-2024: OEM 5507880

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

What is it?
The Cummins L9 SCR (Selective Catalytic Reduction) module for 2022–2024 engines, identified by OEM part number 5507880, is an exhaust aftertreatment component designed to reduce nitrogen oxide (NOx) emissions. Paired with Diesel Exhaust Fluid (DEF), the SCR unit supports a chemical reaction that converts NOx into nitrogen and water before the gases leave the system.

Why choose this SCR Assembly?
This SCR module is built to Cummins’ original specifications for the L9 engine family, ensuring proper compatibility with DEF delivery hardware, exhaust sensors, and engine control systems. When SCR components become worn or less effective over time, NOx conversion efficiency can decline and trigger emissions alerts or inconsistent aftertreatment responses. Installing the correct OEM-specified part helps maintain predictable emissions behavior and coordinated system performance.

Key Benefits
✅ Tailored design for Cummins L9 aftertreatment systems
✅ Supports consistent NOx conversion with DEF chemistry
✅ Helps maintain coordinated operation with related emissions components
✅ Direct-fit replacement — no modifications needed
✅ Constructed for demanding heavy-duty exhaust conditions

Applications
This SCR module is intended for medium- and heavy-duty trucks and commercial vehicles powered by Cummins L9 engines from the 2022–2024 model years. It’s commonly found in vocational fleets, regional transport equipment, delivery vehicles, and other applications where regulated emissions control and reliable exhaust behavior are essential.

Installation Notes
Before servicing, allow the exhaust and aftertreatment system to cool completely. Remove the existing SCR unit and inspect adjacent DEF lines, sensors, and mounting hardware for signs of wear, contamination, or damage. Install the replacement SCR module using proper seals and fasteners to achieve a secure and leak-free fit. After installation, clear any stored system codes and verify correct SCR performance with diagnostic tools.

Final Thoughts
If your Cummins L9-equipped vehicle is experiencing NOx-related warnings or inconsistent emissions output, replacing the SCR module with the correct OEM-specified part can help restore balanced NOx reduction and dependable aftertreatment function. The Cummins L9 SCR (OEM 5507880) plays a central role in maintaining emissions system integrity and supporting reliable engine operation.