Cummins B6.7 SCR 2018-2021: OEM 5507928

Tailored NOx Reduction Module for Cummins B6.7 Engines (2018–2021)

What is it?
The Cummins B6.7 SCR (Selective Catalytic Reduction) unit for 2018–2021 engines, with OEM part number 5507928, is a designed emissions component that works with Diesel Exhaust Fluid (DEF) to reduce nitrogen oxides (NOx) in the exhaust stream. Through a controlled chemical process, the SCR assembly helps convert NOx into nitrogen and water before gases exit the system.

Why choose this SCR Assembly?
This SCR module is manufactured to Cummins’ original specifications for the B6.7 series, ensuring precise fitment and reliable integration with aftertreatment sensors and DEF dosing systems. When SCR elements become worn or less effective, NOx conversion capability can be compromised, potentially leading to system warnings or uneven emissions responses. Using the correct OEM unit helps maintain consistent emissions control behavior.

Key Benefits
✅ Built for Cummins B6.7 aftertreatment configurations
✅ Enables dependable NOx conversion via DEF chemistry
✅ Helps support steady interaction with downstream components
✅ Direct-fit replacement — no modifications required
✅ Designed for durability in heavy-duty exhaust conditions

Applications
This SCR assembly is suitable for medium- and heavy-duty vehicles powered by Cummins B6.7 engines from the 2018 to 2021 model years. It applies to a wide range of applications, including regional transport trucks, vocational fleet vehicles, delivery rigs, and other commercial platforms where regulated emissions control is essential.

Installation Notes
Before servicing, allow the exhaust and aftertreatment system to cool thoroughly. Remove the existing SCR unit and inspect adjacent DEF lines, sensors, and mounting hardware for signs of wear or contamination. Install the replacement SCR assembly using proper seals and fasteners to ensure a secure fit. After installation, clear any stored system codes and verify correct SCR behavior through diagnostic testing.

Final Thoughts
If your Cummins B6.7-equipped vehicle is showing emissions alerts, inconsistent NOx control, or irregular aftertreatment responses, installing the correct OEM SCR assembly can help restore balanced emissions handling. The Cummins B6.7 SCR (OEM 5507928) plays a key role in supporting reliable emissions management and dependable vehicle operation.