Cummins X15 DOC Filter 2018-2021: OEM 5417561

Steady Exhaust Filtration for Cummins X15 Engines (2018–2021)

What is it?
The Diesel Oxidation Catalyst (DOC) filter for the Cummins X15 engine (model years 2018–2021), OEM reference 5417561, is a key emissions-control component. It converts hydrocarbons (HC) and carbon monoxide (CO) in the exhaust stream into cleaner, less harmful gases, helping the aftertreatment system maintain consistent and dependable operation.

Why choose this DOC Filter?
Designed to meet original equipment specifications for the X15 platform, this DOC filter delivers precise fitment and reliable integration with the exhaust and aftertreatment system. A mismatched, worn, or blocked filter can lead to elevated exhaust restriction, more frequent regeneration cycles, or emissions-related fault codes. Installing the correct DOC filter helps preserve steady exhaust flow and dependable system behavior.

Key Benefits
✅ Converts HC and CO into cleaner exhaust output
✅ Supports proper function of downstream aftertreatment components
✅ Helps maintain steady exhaust flow and reduce restriction
✅ Direct-fit design — no modifications required
✅ Built for heavy-duty, high-temperature operating environments

Applications
Ideal for heavy-duty trucks, commercial vehicles, and other equipment powered by Cummins X15 engines from model years 2018 through 2021, particularly where emissions compliance and reliable aftertreatment performance are essential.

Installation Notes
Before servicing, ensure the exhaust and aftertreatment system has fully cooled. Remove the existing DOC filter and inspect surrounding exhaust piping, sensors, and mounting hardware for soot buildup, cracks, or signs of wear. Install the replacement using fresh clamps, gaskets, and seals. After installation, clear any stored emissions-system fault codes and verify proper exhaust system behavior with diagnostic checks.

Final Thoughts
If your X15-equipped vehicle is experiencing elevated exhaust restriction, emissions warnings, or irregular aftertreatment system behavior, replacing the DOC filter with the correct OEM-specified unit is a practical way to restore clean, dependable exhaust flow. This component plays a key role in maintaining the integrity of the emissions-control system and supporting dependable operation.