Cummins B6.7 SCR 2018-2021: OEM 5507928

Purpose-Built Emissions Control Component for Cummins B6.7 Engines (2018–2021)

What is it?
The Cummins B6.7 SCR (Selective Catalytic Reduction) module, covering 2018–2021 model years and identified by OEM part number 5507928, is an emissions aftertreatment unit that helps lower nitrogen oxides (NOx) in the engine’s exhaust. By working in conjunction with Diesel Exhaust Fluid (DEF), the SCR module facilitates a chemical process that converts NOx into harmless nitrogen and water before the exhaust exits the system.

Why choose this SCR Assembly?
This SCR unit is engineered to Cummins’ original specifications for the B6.7 platform, ensuring proper fit and dependable interaction with the DEF dosing system and associated sensors. When SCR components wear or lose effectiveness, NOx conversion can become inconsistent and may lead to system alerts. Using the correct OEM-specified SCR helps support reliable emissions control and predictable aftertreatment responses.

Key Benefits
✅ Designed specifically for Cummins B6.7 aftertreatment systems
✅ Promotes dependable NOx reduction with DEF chemistry
✅ Supports coordinated operation with other emissions components
✅ Direct-fit assembly — no fabrication needed
✅ Engineered for consistent service in heavy-duty exhaust environments

Applications
This SCR assembly is suitable for medium- and heavy-duty trucks and commercial equipment powered by Cummins B6.7 engines manufactured between 2018 and 2021. It’s commonly used in delivery fleets, vocational vehicles, regional transport rigs, and other applications where emissions management and system stability are critical.

Installation Notes
Before servicing, make sure the exhaust and aftertreatment system has cooled down fully. Remove the existing SCR unit and inspect nearby DEF lines, sensors, and mounting hardware for signs of wear or contamination. Install the new SCR assembly with appropriate seals and fasteners for a secure, leak-free fit. After installation, clear any stored fault codes and confirm proper system behavior with diagnostic checks.

Final Thoughts
If your Cummins B6.7-equipped vehicle is exhibiting emissions warnings or varying NOx control behavior, installing the correct OEM SCR assembly can help restore dependable emissions management. The Cummins B6.7 SCR (OEM 5507928) is a key part in maintaining emissions stability and supporting reliable vehicle operation.