Ram Cummins 6.7L SCR 2016-2018: OEM 68371837AA

Restore Proper Emissions Control with an SCR Assembly for Ram Cummins 6.7L

What is it?
The Ram Cummins 6.7L SCR assembly, identified by OEM 68371837AA, is an emissions aftertreatment component designed for Ram trucks equipped with the 6.7L Cummins diesel engine from 2016 through 2018. As part of the Selective Catalytic Reduction (SCR) system, it works alongside Diesel Exhaust Fluid (DEF) to help reduce nitrogen oxide (NOx) emissions before exhaust gases exit the vehicle. This assembly also includes an ammonia trap design to support proper emissions processing.

Why choose this SCR Assembly?
Modern diesel emissions systems rely on properly matched aftertreatment components to maintain stable exhaust flow and emissions compliance. This SCR assembly is designed to meet OEM specifications for Ram Cummins 6.7L applications, ensuring compatibility with DEF dosing components, exhaust sensors, and factory mounting locations. Over time, catalyst efficiency can decline due to heat exposure, soot buildup, or contamination, potentially leading to emissions warnings or reduced aftertreatment effectiveness. Replacing the unit with the correct OEM-matched SCR assembly helps restore reliable system operation and consistent exhaust treatment.

Key Benefits
✅ Designed for Ram Cummins 6.7L engines (2016–2018)
✅ Supports NOx reduction through the SCR process
✅ Compatible with factory DEF and emissions components
✅ Direct-fit replacement for proper installation
✅ Built to withstand high-temperature exhaust conditions

Applications
This SCR assembly is used on Ram 2500, 3500, 4500, and 5500 trucks equipped with the 6.7L Cummins diesel engine from 2016 through 2018. These heavy-duty trucks are commonly used in towing, commercial hauling, vocational, and fleet applications where dependable emissions system operation is essential.

Installation Notes
Allow the exhaust and aftertreatment system to cool completely before beginning service. Remove the existing SCR assembly and inspect nearby sensors, DEF lines, clamps, and mounting points for buildup or damage. Install the replacement assembly using proper hardware and seals to ensure correct alignment and sealing. After installation, clear any stored fault codes and verify proper aftertreatment performance using diagnostic equipment.

Final Thoughts
If your Ram Cummins 6.7L truck is experiencing emissions-related warnings, reduced SCR efficiency, or inconsistent aftertreatment performance, replacing the SCR assembly with the correct OEM component can help restore stable system operation. The Ram Cummins 6.7L SCR assembly (OEM 68371837AA) plays an important role in maintaining reliable emissions control and dependable vehicle performance.