Cummins L9 SCR 2022-2024: OEM 5507876

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

What is it?
The Cummins L9 SCR (Selective Catalytic Reduction) unit for 2022–2024 engines, identified by OEM part number 5507876, is an emissions aftertreatment module that works with Diesel Exhaust Fluid (DEF) to help lower nitrogen oxides (NOx) in the exhaust. Through controlled chemical reaction, this assembly converts NOx into nitrogen and water before the exhaust leaves the system, supporting compliance with emissions standards.

Why choose this SCR Assembly?
Built to Cummins’ original design specifications for the L9 platform, this SCR unit ensures correct fit and dependable compatibility with DEF delivery components, sensors, and control systems. If the SCR module becomes worn or less effective over time, NOx conversion performance can drop and emissions-related alerts may occur. Choosing the correct OEM-specified component helps promote stable emissions control and more predictable exhaust behavior.

Key Benefits
✅ Engine-matched design for Cummins L9 aftertreatment systems
✅ Supports reliable NOx reduction with DEF reaction
✅ Helps maintain coordinated interaction with related emissions parts
✅ Direct-fit replacement — no modifications needed
✅ Constructed for demanding exhaust environments

Applications
This SCR module is suitable for medium- and heavy-duty vehicles powered by Cummins L9 engines manufactured between 2022 and 2024. It’s commonly found in delivery fleets, vocational trucks, regional transport vehicles, and other commercial platforms where dependable emissions control is essential for operations.

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

Final Thoughts
If your Cummins L9-equipped vehicle is showing NOx-related warnings or inconsistent emissions output, replacing the SCR module with the correct OEM-specified unit can help restore balanced aftertreatment performance. The Cummins L9 SCR (OEM 5507876) plays a key role in maintaining regulated exhaust chemistry and contributing to dependable vehicle operation.