Cummins X15 DOC Filter 2018-2021: OEM 5417561

Consistent Exhaust Treatment 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, supporting stable and dependable aftertreatment system operation.

Why choose this DOC Filter?
Built to meet original equipment specifications for the X15 platform, this DOC filter delivers precise fitment and dependable integration with the exhaust and aftertreatment system. A mismatched, worn, or blocked filter can cause increased exhaust restriction, more frequent regeneration cycles, or emissions-related fault codes. Installing the correct DOC filter helps maintain consistent 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
✅ Designed 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. This DOC filter is especially suited for fleet, vocational, and on-road applications where emissions compliance and dependable aftertreatment performance are essential.

Installation Notes
Before servicing, ensure the exhaust and aftertreatment system has fully cooled. Remove the existing DOC filter and inspect nearby 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 through diagnostic checks.

Final Thoughts
If your X15-equipped vehicle is experiencing elevated exhaust restriction, emissions warnings, or erratic aftertreatment behavior, replacing the DOC filter with the correct OEM-specified unit is a practical step toward restoring clean, dependable exhaust flow. This component plays a vital role in preserving the integrity of the emissions-control system and supporting reliable equipment performance.