What You're Actually Buying
This is a NOx sensor, not a temp sensor - it reads nitrogen oxide levels in the exhaust stream so the ECM can trim SCR dosing. On the ISX15/ISX it's usually mounted either pre or post SCR catalyst, and which position you need matters more than most guys think going in.
2894945 covers the ISX15/ISX applications in Kenworth and Peterbilt trucks, plus the 2012 American LaFrance ALF Eagle - a low-volume application but same Cummins emissions architecture underneath the fire truck body.
If your fault code is pointing at a NOx sensor circuit, don't just swap both sensors on a guess. Pull the actual location code (upstream vs downstream) off the fault, then match it to 2894945 or its counterpart before you order.
How the Cross Numbers Line Up
2872297 shows up as a direct cross-reference to 2894945 - same sensor, different part number stamped through Cummins' revision history. 5893295 and 6407242R are the Cummins-side numbers for the same physical sensor, just depending on which parts catalog or reman program you're pulling from.
The thing to watch with NOx sensors isn't spline count or arm length like a lot of drivetrain parts - it's the connector pinout and the mounting boss thread. Two sensors can look identical and read completely different because the wiring harness plug doesn't match, or the thread pitch into the exhaust pipe is off by a hair.
Surest way to confirm: pull the sensor that's coming out and read the number stamped on the housing or its harness tag. Match that against what's listed here before you order, and if you're not sure, call us with the ISX15 serial or the truck's VIN and we'll run it down.
Ordering From PartStop
We keep 2894945 in stock here in Tacoma and can usually get it across the counter same day if you're local - fleets running ISX15s in and out of the port don't have time to wait on emissions parts.
Ship nationwide if you're not close, and every sensor we send out carries our 6+ month warranty. This isn't a guaranteed-fit part sight unseen though - confirm the number against your old sensor or your VIN before it ships, because NOx sensor returns are a pain for everybody once they've been installed.
2894945 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to 2894945. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| Cross-Reference | 2872297 |
| Cummins | 5893295, 6407242R |
Frequently asked questions
Does 2894945 fit my 2015 Kenworth T680 with ISX15?
Likely yes, since ISX15 is the core application, but confirm by pulling the number off your old sensor or checking the ISX15 engine serial against your VIN. Sensor position (upstream/downstream) still needs to match.
Is this the same as Cummins 5893295?
Yes - 5893295 is the Cummins-side number for the same physical sensor as 2894945. Different catalog, same part. Match the connector and mounting thread to be sure before you order.
My fault code says NOx sensor circuit high - do I need one sensor or two?
Depends on the code detail. ISX15 typically runs an upstream and downstream NOx sensor and they're not always interchangeable positions. Pull the specific SPN/FMI code and we can help point you to the right one.
Not sure it fits? We check before you pay.
Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships. No wrong-box returns.
More cross-reference guides
Need the part, not just the reading?
Every part below is a Premium Quality aftermarket Direct Replacement with published OEM cross-reference numbers, a 6+ month warranty and same-business-day shipping from Tacoma, WA. Not sure it fits? Run your VIN — or call and a person who knows trucks will verify fitment before you pay.