Nitrogen Oxide / NOx Sensor ~ Outlet | Cummins 4326874 / 2872946 | FleetRun FR-AFTR553

Keep your semi trucks, big rigs, tractor trailers, and heavy-duty commercial vehicles compliant and running at peak efficiency with the FleetRun FR-AFTR553 Nitrogen Oxide (NOx) Sensor, designed as a direct replacement for Cummins part numbers 4326874 and 2872946. This essential aftertreatment component accurately monitors NOx levels in the exhaust system, allowing your diesel engine to adjust emissions performance and maintain compliance with environmental standards.

Built for Class 8 trucks, long-haul freight haulers, and cargo trucks, the FR-AFTR553 is engineered to withstand extreme temperatures, constant vibration, and harsh road conditions faced by commercial fleets and over-the-road trucks. A failing NOx sensor can trigger check engine lights, force derates, and cause costly downtime for fleet vehicles and owner-operators. Replacing it with this high-quality aftermarket sensor restores proper emissions control, prevents engine derates, and keeps your heavy-duty trucks working hard.

✅ Direct replacement for Cummins 4326874 / 2872946
✅ Perfect for semi trucks, tractor trailers, and commercial diesel vehicles
✅ Monitors nitrogen oxide emissions for reliable aftertreatment performance
✅ Durable, heavy-duty build for fleet use and long-haul applications
✅ Backed by FleetRun warranty, free shipping, fast delivery, and expert customer service

Protect your uptime and keep your cargo trucks, big rigs, and commercial fleets compliant with the FleetRun FR-AFTR553 NOx Sensor—the dependable choice for semi truck repair, fleet maintenance, and heavy-duty diesel applications.