Product Overview
PACCAR 1954664PE Cummins 4326872 Outlet NOx Sensor by Nernex
The Nernex 20.220323 NOx Sensor is a direct-fit aftermarket outlet NOx sensor for applications using PACCAR 1954664PE, Cummins 4326872, International / Navistar 2520640C1, and Cummins A045S169. Designed for compatible diesel exhaust aftertreatment systems, this downstream NOx sensor provides the emissions data needed to support proper SCR performance, DEF/urea dosing control, and continuous monitoring of exhaust aftertreatment efficiency.
1954664PE 4326872 NOx Sensor Interchange & Cross References
| Manufacturer / Brand | Part Numbers |
|---|---|
| PACCAR | 1954664PE, 1954664PRX, 1954664 |
| Cummins | 4326872, 4326872NX, 4326872RX, 4326872CUM |
| International / Navistar | 2520640C1, CMI2520640C1 |
| Cummins | A045S169 |
| Continental | 5WK96749A, 5WK9 6749A, 5WK96749B, 5WK9 6749B |
| Dorman | 904-6015 |
| Dinex | 5EL006 |
| Skyline | SNX005, ANX005 |
| Global Emission Systems | SENN-0005XF |
| FSS Emission Products | 54664-FSS |
| Nernex | 20.220323 |
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 regulate DEF/urea dosing and support effective Selective Catalytic Reduction (SCR) of NOx emissions.
As an outlet / downstream NOx sensor, the Nernex 20.220323 monitors NOx levels after SCR treatment. This feedback helps the vehicle's aftertreatment system evaluate SCR efficiency and continuously monitor emissions performance during real-world operation.
Nernex 20.220323 NOx Sensor Specifications
| Manufacturer | Nernex |
| Part Number | 20.220323 |
| Product Type | Aftermarket NOx Sensor |
| Sensor Position | Outlet / Downstream / Post-SCR |
| Voltage | 12 Volt |
| Terminal Type | 4 Pin |
| System Function | NOx measurement and SCR aftertreatment monitoring |
| Warranty | 1 Year / Unlimited Miles |
| California Availability | Available for sale and shipment to California |
Cummins, PACCAR & Heavy-Duty Truck Applications
The Nernex 20.220323 outlet NOx sensor is intended for compatible commercial and vocational applications equipped with the appropriate Cummins or PACCAR engine and matching SCR exhaust aftertreatment configuration.
Compatible Cummins Engines: ISX15, X15, ISX12, ISL9, L9, ISC 8.3L, ISB 6.7L, B6.7
Compatible PACCAR Engines: MX-11, MX-13
Navistar / MaxxForce Applications: Select applications using the matching OEM NOx sensor and compatible exhaust aftertreatment configuration
Kenworth: T680, T880, W900, T800, T370, C500
Peterbilt: 579, 389, 567, 386, 388, 348, 337
Freightliner: Cascadia, Columbia, Coronado, 108SD, 114SD, M2 106, M2 112 with compatible Cummins power
International / Navistar: ProStar, LT625, LoneStar, TranStar, WorkStar, HV, HX with compatible Cummins ISX15, X15, or L9 power
Western Star: 4900, 5700XE, 4700 with compatible Cummins power
Volvo / Mack: Select VNL, VNM, and Pinnacle applications equipped with compatible Cummins ISX or X15 engines
Bus & Specialty Chassis: Blue Bird All American FE/RE, Thomas Built, Spartan Chassis, and Autocar Xpeditor applications using the matching NOx sensor and compatible Cummins aftertreatment system
Sensor Location: Outlet / Downstream / Post-SCR NOx Sensor
Primary OEM Application Numbers: 1954664PE, 4326872, 2520640C1, A045S169
Direct-Fit Aftermarket NOx Sensor Replacement
The Nernex 20.220323 is intended as a direct-fit aftermarket replacement for the listed PACCAR, Cummins, and International / Navistar 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 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 which are known to the State of California to cause cancer or reproductive harm. For more information go to www.P65Warnings.ca.gov.
