Cummins ISX DOC 2014-2017: OEM 5274535RX

Trusted Emissions Control for Cummins ISX Engines

What Is It?

The Cummins Diesel Oxidation Catalyst (DOC) OEM 5274535RX is a direct-fit replacement for ISX engines manufactured between 2014 and 2017. This component is designed to reduce hydrocarbons (HC) and carbon monoxide (CO) in the exhaust stream, while helping maintain the correct temperatures for effective downstream DPF regeneration.

Why Choose OEM 5274535RX?

Built to Cummins’ original engineering standards, the 5274535RX offers reliable working conditions, correct fitment, and seamless integration with the ISX exhaust system. It plays a key role in emissions reduction and is designed to work with factory-installed sensors and regeneration logic, minimizing system errors and downtime.

Key Benefits

✅ Designed for 2014–2017 Cummins ISX Engines: Ensures proper fitment and emissions working conditions
✅ Reduces Harmful Emissions: Converts CO and unburned HC into less harmful byproducts
✅ Supports DPF Function: Maintains exhaust temperatures needed for soot oxidation
✅ Durable Construction: Withstands thermal cycling and vibration in high-mileage use
✅ Sensor-Compatible: Includes ports for OEM temperature and pressure sensors

Applications

Ideal for over-the-road trucks, freight haulers, and heavy-duty vocational vehicles running Cummins ISX engines from model years 2014 through 2017. This DOC is essential for emissions compliance and maintaining system integrity in high-demand applications.

Installation Notes

A professional technician should install the unit. Inspect surrounding components for wear, and replace any damaged clamps or gaskets. Ensure sensors are clean and properly reconnected. After installation, reset the system parameters and verify that regeneration readiness is intact.

Final Thoughts

The OEM 5274535RX DOC is a reliable and emissions-compliant solution for restoring proper exhaust flow and aftertreatment efficiency in Cummins ISX engines. Built to handle the demands of modern diesel applications, it supports both system reliability and regulatory compliance.