Cummins B6.7 SCR 2018-2024: OEM 5418649

Consistent Emissions Treatment for Cummins B6.7 Engines (2018–2024)

What is it?
The Cummins B6.7 SCR unit, referenced by OEM 5418649, is an emissions aftertreatment component used across Cummins B6.7 diesel engines produced between 2018 and 2024. As part of the selective catalytic reduction process, it works with Diesel Exhaust Fluid (DEF) to support the conversion of nitrogen oxides (NOx) into nitrogen and water before exhaust gases are released from the system.

Why choose this SCR Assembly?
Emissions systems depend on properly matched components to operate reliably. This SCR assembly is manufactured to Cummins’ original specifications for the B6.7 platform, ensuring correct fitment and consistent interaction with DEF dosing equipment, sensors, and electronic controls. When SCR effectiveness declines, emissions alerts or uneven exhaust behavior can occur. Selecting the correct OEM-specified unit helps maintain balanced aftertreatment performance and predictable system operation.

Key Benefits
✅ Engine-specific design for Cummins B6.7 emissions systems
✅ Supports stable NOx processing through DEF interaction
✅ Helps maintain coordinated operation with other aftertreatment components
✅ Direct replacement with no modification required
✅ Designed for long-term exposure to high exhaust temperatures

Applications
This SCR assembly is used on medium- and heavy-duty vehicles equipped with Cummins B6.7 engines from the 2018–2024 model years. Common applications include delivery trucks, vocational fleets, regional transport vehicles, and other commercial equipment where consistent emissions behavior is essential to daily operation.

Installation Notes
Allow the exhaust and aftertreatment system to cool fully before beginning service. Remove the existing SCR unit and inspect surrounding DEF lines, sensors, and mounting points for signs of wear or buildup. Install the replacement assembly using appropriate seals and fasteners to ensure proper alignment. After installation, clear any stored system codes and confirm correct emissions system operation using diagnostic tools.

Final Thoughts
If your Cummins B6.7-powered vehicle is experiencing emissions warnings, fluctuating NOx readings, or inconsistent aftertreatment behavior, replacing the SCR assembly with the correct OEM-specified component can help restore steady exhaust treatment. The Cummins B6.7 SCR (OEM 5418649) plays an essential role in maintaining emissions system stability and dependable vehicle performance.