Cummins B6.7 SCR 2018-2024: OEM 5418525

Comprehensive NOx Management Module for Cummins B6.7 Engines (2018–2024)

What is it?
The Cummins B6.7 SCR (Selective Catalytic Reduction) assembly, covering model years 2018–2024 and identified by OEM part number 5418525, is an emissions aftertreatment unit that works with Diesel Exhaust Fluid (DEF) to reduce nitrogen oxide (NOx) levels in exhaust gases before they leave the system. By facilitating a controlled chemical reaction, the SCR helps transform NOx into nitrogen and water, contributing to regulated exhaust output.

Why choose this SCR Assembly?
This SCR unit is engineered to Cummins’ original specifications for the B6.7 platform, ensuring precise fitment and proper communication with DEF delivery hardware, sensors, and engine controls. When SCR components become less effective over time, NOx conversion performance can fluctuate, leading to warning indicators or uneven aftertreatment behavior. Selecting the correct OEM-specified SCR supports coherent emissions control and more predictable exhaust system performance.

Key Benefits
✅ Designed specifically for Cummins B6.7 aftertreatment layouts (2018–2024)
✅ Promotes consistent NOx conversion with DEF interaction
✅ Helps maintain coordinated operation with related emissions parts
✅ Direct-fit replacement — no alterations required
✅ Built for heavy-duty exhaust environments and extended use

Applications
This SCR assembly is used in medium- and heavy-duty trucks and commercial vehicles powered by Cummins B6.7 engines manufactured between 2018 and 2024. Typical applications include delivery fleets, vocational work vehicles, regional transport rigs, and other platforms where reliable emissions management and regulatory compliance are key operational requirements.

Installation Notes
Always ensure the exhaust and aftertreatment system has cooled completely before service. Remove the existing SCR module and inspect nearby DEF lines, sensors, and mounting hardware for signs of wear, soot buildup, or damage. Install the replacement SCR assembly using the correct seals and fasteners to secure a tight, leak-free fit. After installation, clear any stored system codes and verify proper SCR system behavior using diagnostic tools.

Final Thoughts
If your Cummins B6.7-equipped vehicle is experiencing NOx-related alerts, inconsistent exhaust behavior, or fluctuating aftertreatment performance, replacing the SCR assembly with the correct OEM-specified unit can help restore balanced NOx control and smoother emissions system response. The Cummins B6.7 SCR (OEM 5418525) plays a key role in maintaining regulated exhaust chemistry and supporting reliable vehicle use across demanding cycles.