Diesel engines rely on high-quality emissions components to reduce harmful exhaust pollutants, and the Cummins X15 / X12 / MX13 DOC Filter (2018–2024, OEM 4394782) plays a key role in managing exhaust quality. The Diesel Oxidation Catalyst (DOC) filter is designed to help convert carbon monoxide and unburned hydrocarbons into less harmful gases before they move through the rest of the emissions system. Using the correct OEM-grade DOC filter ensures your engine’s emissions system operates efficiently and helps maintain smooth, dependable performance.
This DOC filter contributes significantly to effective emissions control — here’s why it matters:
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Improves Exhaust Emissions – Helps transform carbon monoxide and hydrocarbons into safer exhaust components, contributing to cleaner overall emissions.
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Supports Downstream Emissions Components – By reducing pollutant load early in the exhaust stream, the DOC filter helps systems like SCR and particulate filters work more effectively.
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Helps Maintain Emissions Compliance – Installing the right DOC filter helps ensure your engine continues to meet regulatory standards without triggering warnings or derate modes.
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OEM-Grade Fit and Durability – As OEM 4394782, this filter matches original equipment specifications for size, materials, and performance, providing dependable long-term operation.
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Prevents Exhaust System Issues – Replacing a worn or restricted DOC filter can help reduce backpressure, improve throttle response, and support smoother exhaust flow.
A failing or restricted DOC filter can lead to reduced emissions efficiency, decreased engine performance, and possible system warnings. The Cummins X15 / X12 / MX13 DOC Filter (OEM 4394782) delivers the OEM-standard quality and emissions support your engine depends on — helping keep your diesel running cleaner and more efficiently. For customers seeking a dependable replacement part, Tamerx offers high-quality components designed to support reliable emissions performance and overall engine health.






