Maintain Aftertreatment Efficiency on Cummins ISX12G (2017–2021)
What is it?
The Cummins ISX12G DOC/DPF OEM 5418390 is a combined Diesel Oxidation Catalyst (DOC) and Diesel Particulate Filter (DPF) assembly that plays a central role in lowering exhaust emissions from your diesel engine. This integrated aftertreatment unit helps filter out soot and particulate matter while supporting proper regeneration cycles, contributing to cleaner exhaust and improved emissions system performance.
Why choose OEM 5418390?
Engineered to match Cummins’ original specifications for ISX12G engines manufactured from 2017 through 2021, this DOC/DPF assembly ensures a precise fit and seamless integration with your vehicle’s factory aftertreatment system. Choosing a genuine OEM component like the 5418390 helps reduce the risk of clogging, supports consistent regeneration, and protects downstream emissions hardware — all of which help enhance reliability and longevity.
Key Benefits
✅ Designed for Cummins ISX12G engines (2017–2021)
✅ Combines DOC and DPF functions for efficient emissions control
✅ Helps trap soot and particulate matter
✅ Supports stable regeneration cycles and reduced maintenance
✅ Direct-fit design for simplified installation
Applications
This DOC/DPF assembly is ideal for heavy-duty commercial trucks, vocational vehicles, and fleet rigs powered by Cummins ISX12G engines from 2017–2021. It’s commonly used in freight transport, regional delivery operations, and other diesel-powered applications where reliable emissions filtration and compliance are essential.
Installation Notes
Before installation, ensure the exhaust system has fully cooled. Inspect nearby sensors, mounting hardware, clamps, and gaskets for wear or damage, and replace any worn components as needed. Once the DOC/DPF assembly is installed, verify all connections are secure and follow manufacturer-recommended system checks to confirm proper operation.
Final Thoughts
When your Cummins ISX12G’s aftertreatment system needs a dependable replacement unit, the OEM 5418390 DOC/DPF assembly delivers a factory-matched solution you can trust. With accurate fitment and consistent performance, it helps keep your emissions system operating efficiently and your vehicle ready for the road. Tamerx has this DOC/DPF assembly in stock and ready to ship.