Cummins B6.7, L9 DOC Filter 2018-2021: OEM 4394769

Consistent Emissions Control for Cummins B6.7 & L9 Engines (2018–2021)

What is it?
The Cummins B6.7, L9 DOC Filter OEM 4394769 is an essential component of the engine’s aftertreatment system, installed within the Diesel Oxidation Catalyst (DOC). Its function is to convert harmful exhaust pollutants—such as hydrocarbons and carbon monoxide—into less harmful gases before the exhaust continues through the system, helping maintain cleaner operation and emissions compliance.

Why choose OEM 4394769?
This DOC filter is specifically designed for Cummins B6.7 and L9 engines built between 2018 and 2021. Its OEM-grade construction ensures proper fitment and seamless integration with the factory emissions system, helping prevent warning lights, system faults, and inconsistent emissions performance. Choosing OEM means dependable operation and long-term durability.

Key Benefits
✅ Built for Cummins B6.7 & L9 engines (2018–2021)
✅ Helps reduce hydrocarbons and carbon monoxide in exhaust
✅ Supports stable and efficient aftertreatment operation
✅ Designed to withstand extreme exhaust temperatures
✅ Direct-fit replacement for straightforward installation

Applications
This DOC filter is used in Cummins-powered commercial trucks, vocational vehicles, delivery fleets, and other diesel equipment manufactured from 2018 through 2021. It’s ideal for applications that require reliable emissions control during daily operation.

Installation Notes
Allow the exhaust and aftertreatment system to cool completely before installation. Inspect surrounding sensors, gaskets, and mounting points for wear or contamination. Follow Cummins-recommended installation procedures and torque specifications to ensure proper sealing. After installation, confirm the emissions system is operating correctly.

Final Thoughts
When emissions-related alerts or reduced aftertreatment efficiency appear, the OEM 4394769 DOC filter provides a reliable replacement you can trust. Designed for proper fit and consistent emissions control, it helps keep your Cummins B6.7 or L9 engine compliant and ready for service. Tamerx has this DOC filter available and ready to ship.