Product Overview
Inlet NOx Sensor Replacement for Cummins 4326870, 2872944, 3687930
Restore commercial fleet emissions performance with this premium 2nd Generation aftermarket Nitrogen Oxide (NOx) Sensor Replacement. Backed by an industry-leading 2-Year Unlimited Mileage Warranty, this brand-new smart technology emissions module completely swaps out with high-traffic OEM cross-references: Cummins 4326870, 2872944, and 3687930 (including stamped NX and RX factory service variations). These Generation 2 sensors outperform traditional aftermarket choices by combining the latest sensing technology with smart software—ensuring accurate, seamless communication with vehicle control systems.
OEM Part Number Cross Reference & Interchange
How to Verify Your Unit: This direct-fit replacement sensor replaces components stamped with housing, casting, or manufacturing tags matching any of the interchangeable assembly numbers or supplier cross-references listed below:
| Manufacturer Cross Reference | Interchange Part Numbers |
|---|---|
| Primary Cummins OEM Cross References | 4326870, 4326870NX, 4326870RX |
| Secondary Cummins / Paccar Cross References | 2872944, 2872944NX, 2872944RX 3687930, 3687930NX, 3687930RX |
| Continental / VDO Cross | 5WK96740A, 5WK9 6740B |
| Aftermarket Alternates | Dinex 5EL012, Skyline SNX001, Global Emission Systems SENN-0022XF |
Supported Truck Models & Engines
Direct drop-in fit for heavy-duty and medium-duty truck chassis configurations running applicable diesel engine platforms:
- Engine Platforms: Cummins Aftertreatment SCR Systems (Pre-Catalyst positions)
- Compatible Makes: Kenworth, Peterbilt, Freightliner, International, and more
Technical Specifications
| Sensor Position Location | Inlet / Upstream (Pre-SCR Engine Position) |
| Voltage System | 12V Diesel Systems |
| Terminal Connector Type | 4-Pin Flat Plug Interface |
| Warranty Protection | 2-Year Unlimited Mileage Warranty Protection |
Order Fulfillment & Core Policy
There is absolutely no core charge or core return required for this product. You purchase this premium emissions module outright with zero additional core fees or backend shipping returns to manage.
All orders received by 2:00 PM EST are processed for immediate shipment out of our regional distribution hubs to guarantee minimal fleet downtime. Because we service heavy-duty commercial networks locally, counter sales may occasionally impact real-time digital stock counts. If an availability conflict arises with your pending lookup order, our service desk will contact you instantly.
Frequently Asked Questions
Q: Will this sensor clear my active active codes?
A: Yes. Because this premium 2nd Generation smart sensor matches original factory calibration parameters and sensor software protocols, it will allow your vehicle's ECU to reset and clear active check engine lights or engine derate fault codes once the proper adaptation reset or drive cycle is completed.
Q: How do I verify this fits my specific truck engine setup?
A: Check the cross-reference list above for your stamped OEM number. If your old sensor module matches 4326870, 2872944, or 3687930, this direct-fit replacement is the correct assembly.
Important Fitment Note: NOx sensors can vary heavily by engine family, emissions tier configuration, and location placement. While aftermarket wire harness lengths or lead protective configurations may vary slightly from your factory design, they are completely engineered for direct installation fitment. Always match your replacement query to the exact part number stamped on your vehicle's old sensor casing, or cross-verify using your VIN, engine serial number (ESN), or official dealer service documentation before purchasing. Product images are for reference only.
California Proposition 65 Warning: WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer or reproductive harm. For more information go to www.P65Warnings.ca.gov.