Emissions Support Filter for Cummins L9 (2022–2024)
What is it?
The Cummins L9 DOC Filter OEM 4394862 is a key emissions control component located in the Diesel Oxidation Catalyst (DOC) of the aftertreatment system. It works by oxidizing harmful exhaust pollutants—like hydrocarbons and carbon monoxide—into less harmful compounds before the exhaust continues through the rest of the system, helping your engine run cleaner and stay compliant.
Why choose OEM 4394862?
This DOC filter is designed specifically for Cummins L9 engines manufactured from 2022 through 2024. Its exact-fit OEM construction ensures seamless integration with your vehicle’s original aftertreatment components, reducing the chance of emissions faults and supporting consistent performance. With genuine OEM quality, you’re investing in long-lasting durability and reliable emissions control.
Key Benefits
✅ Built for 2022–2024 Cummins L9 engines
✅ Helps reduce hydrocarbons and carbon monoxide in exhaust
✅ Promotes smoother aftertreatment system performance
✅ Designed to withstand high-temperature exhaust conditions
✅ Direct-fit replacement for easy installation
Applications
This DOC filter is ideal for Cummins L9-powered commercial trucks, vocational vehicles, delivery fleets, and other diesel equipment built between 2022 and 2024 that depend on effective emissions control systems for daily operation.
Installation Notes
Make sure the exhaust and aftertreatment system are completely cooled before beginning installation. Inspect nearby sensors, gaskets, and connectors for signs of wear or contamination. Follow Cummins-recommended installation procedures and torque specifications to ensure proper sealing and reliable performance. After installation, verify that the emissions system is working correctly.
Final Thoughts
If your Cummins L9 engine shows emissions-related warnings or diminished aftertreatment performance, the OEM 4394862 DOC filter provides a dependable OE-grade replacement option. Designed for accurate 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.