Cummins B6.7 SCR 2018-2021: OEM 5507928

Dedicated Emissions Catalyst for Cummins B6.7 Platforms (2018–2021)

What is it?
The Cummins B6.7 SCR assembly, used on 2018–2021 engines and identified by OEM 5507928, is an exhaust aftertreatment component designed to manage nitrogen oxide (NOx) levels. By interacting with Diesel Exhaust Fluid (DEF), the unit supports the chemical conversion of NOx into nitrogen and water before exhaust gases exit the system.

Why choose this SCR Assembly?
This SCR unit is built specifically for the Cummins B6.7 engine family, ensuring proper fitment and compatibility with onboard sensors and DEF dosing hardware. When SCR components degrade or become less responsive, emissions readings may fluctuate and warning indicators can appear. Selecting the correct OEM-specified assembly helps maintain steady emissions behavior and consistent aftertreatment operation.

Key Benefits
✅ Engine-matched design for Cummins B6.7 emissions systems
✅ Supports reliable NOx processing through SCR chemistry
✅ Helps maintain stable coordination within the aftertreatment system
✅ Direct-fit replacement for simplified installation
✅ Constructed to handle sustained high-temperature exhaust environments

Applications
This SCR assembly is commonly used on medium- and heavy-duty trucks powered by Cummins B6.7 engines produced between 2018 and 2021. Typical applications include delivery fleets, municipal vehicles, regional transport units, and vocational equipment where dependable emissions control is required.

Installation Notes
Allow the exhaust and emissions components to cool completely before service. Remove the existing SCR unit and examine nearby DEF lines, sensors, and mounting points for wear or contamination. Install the replacement assembly using appropriate seals and fasteners to ensure proper alignment. After installation, clear any stored fault codes and confirm correct system operation using diagnostic tools.

Final Thoughts
If your Cummins B6.7-equipped vehicle is experiencing emissions warnings or inconsistent NOx control, replacing the SCR assembly with the correct OEM-specified unit can help restore balanced aftertreatment function. The Cummins B6.7 SCR (OEM 5507928) plays a central role in maintaining regulated exhaust chemistry and consistent vehicle operation.