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OEM Price: USD 913

USD 421

Save: $492

Roadwarrior Part #


Engine Manufacturer

OEM Part Number:



Direct Fit Replacement NOx Sensor for Cummins

OEM Price: USD 913

USD 421

Save: $492

Free ground shipping
Brand new! No core charge
OEM direct fit
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Having Trouble with Your Cummins NOx Sensor 4326869?

Roadwarrior part NOX-CXX-011 is a complete plug-and-play replacement for your Cummins outlet NOx sensor 4326869. It is one of eight Cummins NOx sensor models we stock replacements for in the Roadwarrior aftermarket catalogue! We test our NOx sensors rigorously before they’re released to ensure they’re compatible with your Cummins ISX engine! Our tests also confirm that our replacements are as reliable and effective as the outlet Cummins NOx sensor they’re replacing!


What is a NOx Sensor?

Most Cummins engines have two NOx sensors, with one positioned on either side of the SCR. The upstream/ inlet sensor measures NOx levels in the exhaust before the SCR and the outlet/ downstream NOx sensor measures NOx levels after it. The ECU uses this comparative data to ensure that the SCR is working properly and is getting enough DEF. This helps the SCR catalyst reduce toxic NOx levels in your semitruck’s exhaust!


Why Should You Pick Roadwarrior NOx Sensors?

Bad experiences or negative reviews from colleagues make many OTR drivers wary about trying aftermarket replacements for Cummins NOx sensors. The aftermarket experience varies a lot between suppliers, so we understand this approach. That’s part of the reason we place so much emphasis on building trust with our customers! By keeping our focus on providing high-performance, reliable parts, we’ve built up a reputation for quality. With a Roadwarrior part you can enjoy the aftermarket’s lower prices and shorter wait times, with an OEM’s reliability. You can order Roadwarrior replacements for your outlet Cummins NOx sensor 4326869 through your local dealer, or through our website!


As a Canadian company with 13 warehouses in North America, we’re always within reach! We keep our most popular parts permanently in stock at our warehouses, ready when you need a quick replacement! Our most popular parts even come with next-day delivery or same-day pick-up! If you prefer, you can also order parts from our sales team on 1-877-897-9759. If you want to know more about what qualities to look for in a 4326869 aftermarket Cummins NOx sensor first, why not check out our blog?


What Are the Most Common Cummins NOx Sensor Problems?

Cummins NOx sensors are an extremely sensitive part that measures fluctuations in microscopic NOx particles in your exhaust stream. However, a small amount of damage or contamination can cause nitrogen oxide sensors to malfunction. Soot contamination from other parts of the emissions system is one of the main problems affecting the Cummins NOx sensor. If soot from the exhaust clogs up the nitrogen oxide sensor, it’ll give inaccurate readings. This can lead to too much or too little DEF being injected into the exhaust before the SCR. The ECU will register the data anomaly and trigger a DTC to alert you to the issue.


Your Cummins NOx sensor 4326869 is also very susceptible to moisture contamination! Exposure to moisture can occur either during installation or from the exhaust once the system is running. The contamination risk is one of the reasons we recommend having your NOx sensor professionally installed. If your replacement sensor is faulty, having it installed professionally also makes it easier to prove that the issue occurred during manufacture not installation!




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Better Coating, Better Performance.

Roadwarrior is the only manufacturer to use Metalcor® catalyst technology across its entire range of Diesel Oxidation Catalysts (DOCs) and Selective Catalytic Reduction catalysts (SCRs). Metalcor® catalysts feature high activity catalyst coatings fused to thinner, stronger, catalyst substrates to guarantee maximum performance under the harshest conditions.

Metalcor® catalyst coatings are designed and produced in our own labs. We then inspect each unit to ensure you get more fuel efficiency, lower consumption of DEF, and long term performance from your heavy duty engine!


Roadwarrior Has You Covered!

All Roadwarrior emissions parts carry a full value 12 month warranty.

LightningVolt lithium batteries carry a full value 30 month warranty.

To make the process hassle-free, our parts have a metal nameplate with the serial number, so even after 500,000 miles of service, it’s still easy to identify. This avoids the common problem of serial numbers printed on stickers that burn off after the first start-up, making them impossible to return. Our failsafe system allows us to work in your interests, honouring claims for on-road and off-road replacements, and giving you peace of mind.

And since Roadwarrior parts are designed to meet or exceed OEM specifications, you can rest easy knowing our direct fit parts will take the problems out of your aftertreatment without interfering with your OEM warranty.

Next Day Is Nice, Same Day is Better!​

A faulty emissions control system can cost you thousands in wasted man-hours as your heavy equipment sits in the shop awaiting a new part. Whether it’s a truck behind on orders, a bus that can’t take passengers, or heavy machinery delaying construction deadlines, Roadwarrior can get you moving again! 

Roadwarrior has twelve warehouses across the U.S.A. and Canada, which can deliver the most popular aftertreatment parts in 1-2 days. With over 1,000 DPFs, DOCs and SCRs on offer, Roadwarrior offers the largest aftertreatment catalogue.

*LightningVolt lithium batteries ship directly from Roadwarrior in Ontario, to ALL 50 states, including Alaska and Hawaii within 2-4 days.