OEM Diesel Oxidation Catalyst - DOC

When your DPF isn't getting hot enough to finish a regen, or you're seeing persistent 'Low Efficiency' codes, your Diesel Oxidation Catalyst (DOC) is likely the reason. As the 'furnace' of your emissions system, a tired or face-plugged DOC can’t generate the heat needed to keep your DPF clean, eventually leading to a total system shutdown.

We specialize in genuine surplus OEM catalysts for Cummins engines, providing the exact substrate precious-metal loading your ECU expects. Swapping in a factory part like the Cummins 4965222 or 2880505 is the most reliable way to clear your codes and protect your DPF from premature plugging.

At DPF Super Store, we focus on making genuine OEM parts accessible without the long dealer wait times. We maintain an in-stock inventory of Cummins DOC modules in our Vancouver and Toronto warehouses, so you get fast, domestic shipping across Canada without the headache of cross-border customs or duties. Because these are genuine factory units, you don’t have to worry about fitment issues or sensor compatibility—they bolt right in and get you back to work.

If you need a hand verifying which OEM number matches your engine serial, reach out to our team, and we'll get you sorted.