Effective Aftertreatment Filtration for Cummins X15 (2018–2021)
What is it?
The Cummins X15 DOC Filter OEM 4394754 is an essential emissions control component located in the Diesel Oxidation Catalyst (DOC) of your engine’s aftertreatment system. It helps oxidize harmful exhaust pollutants—like hydrocarbons and carbon monoxide—into less harmful compounds before the exhaust continues through the rest of the system, promoting cleaner emissions and more efficient engine performance.
Why choose OEM 4394754?
This DOC filter is specifically engineered for Cummins X15 engines manufactured between 2018 and 2021. Its precise OEM construction ensures a proper fit and seamless integration with your vehicle’s original aftertreatment components, helping reduce the risk of emissions faults and supporting consistent operation. With genuine OEM quality, you get trusted durability and dependable emissions control.
Key Benefits
✅ Designed for 2018–2021 Cummins X15 engines
✅ Helps lower hydrocarbons and carbon monoxide in exhaust
✅ Enhances aftertreatment system performance
✅ Built to withstand high-temperature exhaust environments
✅ Direct-fit replacement for easier installation
Applications
This DOC filter is ideal for Cummins X15-powered commercial trucks and heavy-duty equipment produced from 2018 through 2021. Typical uses include over-the-road tractors, vocational fleet vehicles, delivery rigs, and other diesel machinery that depend on reliable emissions control for daily performance and compliance.
Installation Notes
Ensure the exhaust and aftertreatment system are completely cooled before beginning installation. Inspect nearby sensors, gaskets, and connections for signs of wear or contamination. Follow Cummins-recommended installation procedures and torque specifications to ensure proper sealing and optimal performance. After installation, verify that the emissions system is functioning correctly.
Final Thoughts
When your Cummins X15 engine shows emissions-related alerts or reduced aftertreatment effectiveness, the OEM 4394754 DOC filter offers a dependable, OE-grade replacement solution. Designed for precise fit and consistent emissions control, it helps keep your engine compliant and running efficiently. Tamerx has this DOC filter in stock and ready to ship.

