Product Overview
Inlet NOx Sensor Replacement for Cummins Paccar 4326870, 2872944
Get uncompromised original equipment performance without paying the high dealer markup. Made in the USA, this premium EPA10 compliance Inlet Nitrogen Oxide (NOx) Sensor is a genuine OE manufactured component that ships directly to you in a plain white box. Built as a direct-fit replacement to clear engine derate conditions and restore SCR efficiency, this upstream sensor ensures exact, factory-level emissions monitoring on Kenworth, Peterbilt, Freightliner, and International commercial trucks running Cummins or Paccar diesel platforms.
Cross Reference & Interchange Numbers
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:
| Cross Type | Interchange Part Numbers |
|---|---|
| Primary OEM Cross References | 4326870, 2872944 (Also replaces factory service numbers 4326870NX, 4326870RX, 2872944NX, 2872944RX) |
| Secondary OEM Cross | 3687930 (Fits factory service numbers 3687930NX, 3687930RX) |
| Continental / VDO Cross | 5WK96740A, 5WK9 6740B |
| Aftermarket Alternates | Dinex 5EL012, Global Emission Systems SENN-0022XF, Skyline SNX001 |
Supported Truck Chassis & Engines
Direct drop-in fit for heavy-duty and medium-duty truck configurations running applicable clean diesel engine setups:
- Engine Platforms: Cummins and Paccar Diesel Systems
- Compatible Truck Makes: Kenworth, Peterbilt, Freightliner, International, and more
Technical Specifications
| Sensor Position Location | Inlet / Upstream (Pre-SCR) |
| Voltage System | 12V |
| Terminal Connector Type | 4-Pin Flat Plug |
| Exhaust Emission Norm | EPA10 |
| Cable Length | 792.99 mm (31.22 inches) |
| Module Dimensions | 185.00mm x 65.02mm x 41.40mm (7.28" x 2.56" x 1.63") |
| Net Weight | 0.39 kg (0.85 lbs) |
Shipping & Order Fulfillment
Standard free ground shipping within the continental United States is included with this purchase. All orders received by 2:00 PM EST ship out the same business day from one of our several regional distribution hubs to guarantee minimal downtime. Expedited shipping options, including guaranteed overnight delivery, can be selected directly at checkout. Please Note: Because we fulfill inventory locally across regional networks, counter sales may occasionally impact real-time stock counts. If an availability conflict arises with your order, our service desk will contact you instantly.
Frequently Asked Questions
Q: Will this sensor clear my active Cummins SCR/emissions fault codes?
A: Yes. Because this replacement sensor matches original factory calibration parameters, it will allow your vehicle's ECU to reset and clear active emissions codes once the proper adaptation reset or drive cycle is completed to clear active engine derate conditions.
Q: How do I verify this fits my specific truck?
A: Check the cross-reference list above for your stamped OEM number. If your old sensor matches 4326870 or 2872944, this unit is the correct direct-fit replacement plug.
Important Fitment Note: NOx sensors vary heavily by model year, engine family, emissions tier configuration, and location placement. While aftermarket wire harness lengths or lead protective sheath 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.