Need to Replace a Cummins NOx Sensor (2894943 or 2871974)?
Our NOX-CXX-004 is a precise-fit replacement for Cummins outlet NOx sensors with OEM part numbers 2894943 or 2871974. The Roadwarrior aftermarket catalogue includes plug-and-play substitutes for eight Cummins NOx sensor models. We test our NOx sensors thoroughly before releasing them to ensure they’re compatible with Cummins ISX engines! Our testing also confirms that our replacement parts meet or exceed the performance standards of the outlet Cummins NOx sensor they’re replacing!
What is a Cummins NOx Sensor?
Most Cummins engines have 1 NOx sensor on either side of the SCR to monitor the catalyst’s NOx reduction performance! The inlet/ upstream sensor monitors NOx levels before the SCR, so the ECU knows how much DEF to inject. The outlet/ downstream nitrogen oxide sensor then checks NOx levels in the exhaust after the SCR. The ECU uses this comparative data to test how well the SCR is working and whether to inject more DEF. This helps the SCR catalyst reduce toxic nitrogen oxide particles in the semitruck’s exhaust!
Why Choose Roadwarrior NOx Sensors?
Either because of their own experiences or stories from colleagues, many drivers are unsure about trying aftermarket Cummins NOx sensors. Buyer experience and part quality vary considerably between different aftermarket suppliers, so it’s important to find a company you trust. That’s why we place such emphasis on showing our customers that we’re a reliable choice! We do this by supplying high-performing parts when and where you need them, with a hassle-free warranty to protect your investment! We combine the lower prices and shorter wait times of an aftermarket part, with the reliability of an OEM. You can order Roadwarrior replacements for your outlet Cummins NOx sensor (part number 2894943 or 2871974) through your local dealer. You can also get parts directly through our website, or by calling and speaking to our sales team!
As a Canadian company with 13 warehouses across North America, we’re easy to reach! Our most popular parts are always in stock at our warehouses, so a Roadwarrior replacement means a shorter wait time! Many of our parts are even available for next-day delivery or same-day pick-up! If you’d rather order over the phone, just call 1-877-897-9759 to speak to a member of the team! You can also learn more about what to look for in an aftermarket replacement for a Cummins NOx sensor (2894943 or 2871974) in 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, like all delicate sensors, a small amount of damage or contamination can cause nitrogen oxide sensors to malfunction. One of the most common causes of 2894943 or 2871974 Cummins NOx sensor problems is soot contamination from other parts of the emissions system. If soot from the exhaust clogs up the nitrogen oxide sensor, it will quickly start giving inaccurate readings! Unfortunately, this can lead to too much or too little DEF being injected before the SCR. The ECU will then trigger a fault code to alert you to this issue!
Your 2894943 or 2871974 Cummins NOx sensors are also very susceptible to moisture contamination. The sensor can be exposed to moisture either during installation or from the exhaust when it’s in operation. The risk of contamination is one reason we recommend having your NOx sensor professionally installed, rather than doing it yourself.