Cummins L9 SCR 2022-2024: OEM 5507876

Engineered NOx Treatment for Cummins L9 Engines (2022–2024)

What is it?
The Cummins L9 SCR (Selective Catalytic Reduction) module, with OEM part number 5507876, is a core emissions aftertreatment component for Cummins L9 engines built between 2022 and 2024. It uses Diesel Exhaust Fluid (DEF) to initiate a chemical reaction that converts nitrogen oxides (NOx) in the exhaust into nitrogen and water before the gases exit the system, helping the engine operate within emissions standards.

Why choose this SCR Assembly?
This SCR unit is built to Cummins’ original specifications for the L9 platform, ensuring seamless communication with DEF dosing systems, sensors, and onboard control modules. If the SCR assembly becomes less effective due to wear or contamination, NOx reduction efficiency can decline and trigger emissions alerts or irregular system behavior. Selecting the correct OEM-specified unit helps maintain dependable emissions control and more predictable aftertreatment performance.

Key Benefits
✅ Developed specifically for Cummins L9 emissions systems (2022–2024)
✅ Supports dependable nitrogen oxide reduction via DEF interaction
✅ Helps sustain coordinated aftertreatment system activity
✅ Direct-fit replacement — no modifications required
✅ Constructed for heavy-duty exhaust environments

Applications
This SCR assembly is ideal for medium- and heavy-duty vehicles equipped with Cummins L9 engines manufactured between 2022 and 2024. It’s commonly used in delivery fleets, vocational trucks, regional transport rigs, and other commercial platforms where regulated emissions control and system consistency are essential.

Installation Notes
Before servicing, allow the exhaust and aftertreatment system to cool thoroughly. Remove the existing SCR module and inspect surrounding DEF lines, sensors, and mounting hardware for wear or soot buildup. Install the replacement SCR assembly using proper seals and fasteners to ensure a secure, leak-free fit. After installation, clear any stored system codes and verify correct SCR operation with diagnostic checks.

Final Thoughts
If your Cummins L9-equipped machine is exhibiting emissions alerts or inconsistent NOx conversion behavior, replacing the SCR module with the correct OEM-specified part can help restore balanced aftertreatment function. The Cummins L9 SCR (OEM 5507876) plays an important role in managing regulated exhaust chemistry and supporting reliable vehicle operation.