Dependable Emissions Filtration for Cummins B6.7 & L9 (2022–2024)
What is it?
The Cummins B6.7, L9 DOC Filter OEM 4394859 is a key emissions control component located in the Diesel Oxidation Catalyst (DOC) of your engine’s aftertreatment system. It works to oxidize harmful exhaust pollutants—such as hydrocarbons and carbon monoxide—into less harmful gases, helping your engine produce cleaner emissions and maintain efficient performance.
Why choose OEM 4394859?
This DOC filter is engineered specifically for Cummins B6.7 and L9 engines manufactured from 2022 through 2024. Its precise OEM design ensures a proper fit and seamless integration with your vehicle’s emissions system, reducing the chance of faults while enhancing overall durability. With genuine OEM quality, you get emissions control you can rely on day after day.
Key Benefits
✅ Built for 2022–2024 Cummins B6.7 & L9 engines
✅ Helps decrease hydrocarbons and carbon monoxide in exhaust
✅ Supports smoother aftertreatment performance
✅ Designed to endure high-temperature exhaust conditions
✅ Direct-fit replacement for easier installation
Applications
This DOC filter is ideal for Cummins-powered commercial trucks, vocational vehicles, delivery fleets, and other diesel machinery built from 2022 through 2024 that depend on compliant and efficient emissions control systems.
Installation Notes
Ensure the exhaust and aftertreatment system are completely cooled before beginning installation. Inspect nearby sensors, gaskets, and connections for wear or contamination. Follow Cummins-recommended installation procedures and torque specifications to ensure proper sealing and performance. After installation, check that the emissions system is functioning correctly.
Final Thoughts
If your Cummins B6.7 or L9 engine is showing emissions-related alerts or reduced aftertreatment efficiency, the OEM 4394859 DOC filter offers a dependable, OE-grade replacement solution. Designed for accurate fit and consistent emissions control, it helps keep your engine compliant and operating efficiently. Tamerx has this DOC filter in stock and ready to ship.