Cummins B6.7 SCR : OEM 5418490

Targeted Emissions Management for Cummins B6.7 Engines

What is it?
The Cummins B6.7 SCR assembly, referenced by OEM part number 5418490, is an emissions aftertreatment component used in Cummins B6.7 diesel applications. As part of the selective catalytic reduction system, it works alongside Diesel Exhaust Fluid (DEF) to help change nitrogen oxides (NOx) in the exhaust stream into nitrogen and water before the exhaust exits the system.

Why choose this SCR Assembly?
Aftertreatment systems depend on components that are correctly matched to the engine platform. This SCR unit is built to Cummins’ original design standards for the B6.7, ensuring proper fit and consistent communication with DEF dosing equipment, sensors, and electronic controls. When SCR efficiency declines due to age or contamination, emissions alerts and uneven exhaust treatment may occur. Selecting the correct OEM-specified assembly helps maintain stable emissions handling and predictable system behavior.

Key Benefits
✅ Platform-specific design for Cummins B6.7 engines
✅ Supports steady NOx conversion through DEF interaction
✅ Helps maintain smooth coordination with other aftertreatment components
✅ Direct replacement with no modifications required
✅ Designed for continuous exposure to high exhaust temperatures

Applications
This SCR assembly is commonly used in medium- and heavy-duty vehicles equipped with Cummins B6.7 engines. Typical applications include delivery fleets, vocational trucks, municipal vehicles, and regional transport equipment where consistent emissions control is essential for daily operation.

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

Final Thoughts
If your Cummins B6.7-powered vehicle is experiencing emissions warnings, inconsistent NOx readings, or irregular aftertreatment behavior, replacing the SCR assembly with the correct OEM-specified component can help restore balanced exhaust treatment. The Cummins B6.7 SCR (OEM 5418490) plays a critical role in maintaining emissions system stability and dependable vehicle operation.