Cummins X15, X12 DOC Filter 2022-2025: OEM 5509695
Emission Relief on the Horizon: Cummins X15, X12 DOC Filter (2018–2025, OEM 5509695)
What is it?
The Cummins X15, X12 DOC Filter (OEM 5509695) is a Diesel Oxidation Catalyst designed for the X15 and X12 heavy-duty engine platforms in service from approximately 2018 through 2025. Its function is to oxidize hydrocarbons (HC) and carbon monoxide (CO) in the exhaust before the gases reach downstream after-treatment components, helping maintain emissions compliance and system integrity.
Why Choose the Cummins X15, X12 DOC Filter (OEM 5509695)?
This DOC is manufactured to factory standards, matching mounting geometry, sensor ports, exhaust flow dynamics and substrate design from Cummins’ original equipment. By choosing this exact OEM-spec filter, you ensure proper fitment, maintain correct exhaust behaviour, and avoid calibration or flow issues that can arise with mismatched parts.
Key Benefits
✅ Exact OEM Fitment – Matches factory mounts, sensors, and flanges to ensure installation is straightforward and accurate.
✅ Heavy-Duty Reliability – Constructed to withstand intense heat, vibration, and high exhaust flow typical of large displacement diesel engines.
✅ Emission Control Assurance – Facilitates effective conversion of HC/CO, supporting clean operation and regulatory compliance.
✅ System Stability – Helps avoid malfunction codes or irregular regeneration cycles by maintaining proper exhaust dynamics.
✅ Downstream Protection – By ensuring clean upstream oxidation, the rest of the after-treatment system (DPF, SCR, sensors) experiences less stress and longer life.
Applications
The Cummins X15, X12 DOC Filter (2018–2025, OEM 5509695) is suited for heavy-duty on-highway trucks, vocational vehicles, and commercial rigs fitted with X12 or X15 engines from the 2018 to 2025 period. Ideal for fleet operations where emission-system reliability and uptime are vital.
Installation Notes
Installation should be performed by a certified technician. First, confirm engine type, serial number, and part number compatibility. Remove the existing DOC, inspect sensor wiring and mounting flanges, clean all mating surfaces, and replace any worn gaskets or clamps. Install the new unit, following torque specifications and sensor reconnections. Once installed, clear any diagnostic trouble codes and monitor exhaust temperature and pressure during initial operation to verify correct function.
Final Thoughts
When the emission system is out of spec, the solution starts at the source. The Cummins X15, X12 DOC Filter (OEM 5509695) offers factory-matched precision, heavy-duty construction, and direct fitment—making it a strong choice to restore system performance, uphold compliance, and keep your engine running clean mile after mile.