Product Overview
PACCAR 1831900PE Cummins 2894939 2871978 NOx Sensor by Nernex
The Nernex 20.220332 NOx Sensor is a direct-fit aftermarket outlet NOx sensor for applications using PACCAR 1831900PE, Cummins 2894939, Cummins 2871978, and Cummins 4984053. Designed for compatible Cummins and PACCAR-powered exhaust aftertreatment systems, this downstream NOx sensor provides accurate exhaust-gas measurement used to support SCR performance, DEF/urea dosing control, and continuous emissions-system monitoring.
PACCAR 1831900PE Cummins 2894939 NOx Sensor Interchange & Cross References
| Manufacturer / Brand | Part Numbers |
|---|---|
| PACCAR | 1831900PE, 1831900PRX, 1831900 |
| Cummins | 2894939, 2894939NX, 2894939RX, 2894939CUM |
| Cummins | 2871978, 2871978NX, 2871978RX |
| Cummins | 4984576, 4984576NX, 4984576RX, 4984053, 4984053NX, 4984053RX, A034X846 |
| Continental / VDO | 5WK96674A, 5WK9 6674A |
| Dinex | 5EL002 |
| Dorman | 904-6017 |
| FSS Emission Products | 62435-FSS |
| Nernex | 20.220332 |
Nernex NOx Sensor Technology
Nernex develops emissions-sensing products around the precise measurement and control required by modern diesel exhaust aftertreatment systems. Nernex NOx sensor electronics and software are designed to provide accurate exhaust-gas data to the vehicle control system, helping support DEF/urea dosing and effective Selective Catalytic Reduction (SCR) of NOx emissions.
As an outlet / downstream NOx sensor, the Nernex 20.220332 monitors NOx levels after exhaust treatment. This feedback allows the vehicle's emissions-control system to evaluate aftertreatment performance and continuously monitor NOx reduction during vehicle operation.
Nernex 20.220332 NOx Sensor Specifications
| Manufacturer | Nernex |
| Part Number | 20.220332 |
| Product Type | Aftermarket NOx Sensor |
| Sensor Position | Outlet / Downstream / Post-Catalyst |
| Voltage | 12 Volt |
| Terminal Type | 4 Pin |
| System Function | NOx measurement and exhaust aftertreatment monitoring |
| Warranty | 1 Year / Unlimited Miles |
| California Availability | Available for sale and shipment to California |
Cummins & PACCAR Engine Applications
The Nernex 20.220332 outlet NOx sensor is intended for compatible heavy-duty, medium-duty, vocational, transit, and specialty applications equipped with the matching Cummins or PACCAR engine and exhaust aftertreatment configuration.
Cummins Heavy-Duty Engines: ISX15 / X15 14.9L, ISX12 / ISX11.9 11.9L
Cummins Mid-Range & Vocational Engines: ISL9 / L9 8.9L, ISC 8.3L, ISB 6.7L / B6.7
PACCAR Platforms: PX-7 6.7L, PX-8 / PX-9 8.3L / 8.9L
Heavy-Duty Truck, Bus & Vocational Applications
Freightliner: Cascadia, Columbia, Coronado, M2 106, M2 112, 108SD, 114SD
Western Star: 4700, 4800, 4900 with compatible Cummins ISX or L9 configurations
Kenworth: T660, T680, T800, T880, W900, T270, T370 with compatible Cummins ISX, PACCAR PX-7, or PX-9 configurations
Peterbilt: 386, 388, 389, 579, 567, 337, 348 with compatible Cummins ISX, PACCAR PX-7, or PX-9 configurations
International: ProStar, LoneStar, LT Series, WorkStar, TranStar, DuraStar 4300 / 4400 with compatible Cummins ISX15, ISL9, or ISB 6.7L power
Volvo / Mack: Select VN, VNL, and Pinnacle applications factory-configured with compatible Cummins ISX engines
School & Transit Bus: Blue Bird, Thomas Built, and Gillig applications equipped with compatible Cummins ISB 6.7L, ISL9, or L9 engines
Fire & Emergency: Spartan, Pierce, and E-ONE chassis equipped with compatible Cummins ISX12, ISX15, or L9 engines
Sensor Location: Outlet / Downstream / Post-Catalyst NOx Sensor
Primary OEM Application Numbers: 1831900PE, 2894939, 2871978, 4984053
Direct-Fit Aftermarket NOx Sensor Replacement
The Nernex 20.220332 is intended as a direct-fit aftermarket replacement for the listed PACCAR and Cummins NOx sensor numbers. Before ordering, verify the original stamped sensor part number, outlet sensor position, 12-volt electrical system, 4-pin connector configuration, and vehicle or engine application. Matching the number stamped on the original NOx sensor is the most reliable way to confirm compatibility.
Product images are for reference only. Always verify the original sensor part number, sensor location, voltage, and connector configuration before installation.
California Proposition 65 Warning: ⚠️ WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
