WJIECO 2872297 NOx Sensor Durable. Cross references 5WK96692, 5WK96692A, 5293295, 5293295RX, 904-6003, 2894945. 12V upstream engine outlet NOx Sensor for Cummins ISB6.7, ISL9, QSB6.7 EPA10 diesel engines. Fits Freightliner M2, Blue Bird, Gillig, Kenworth T270 T370, Peterbilt 337, International medium duty trucks and buses, plug & play install.

2872297 NOx Sensor Overview

The 2872297 NOx Sensor manufactured by WJIECO is the upstream engine-out NOx sensor located before the SCR catalyst in the EPA10 SCR aftertreatment system for medium-duty trucks and transit buses powered by Cummins ISB6.7, ISL9 and QSB6.7 diesel engines. This upstream NOx Sensor reads raw NOx concentration coming out of the engine, so the ECM can calculate the correct amount of DEF urea to inject into the exhaust stream.

This upstream signal is the foundation of the whole SCR closed-loop control. When this NOx Sensor suffers signal drift, soot clogging, internal element failure or communication loss, the ECM will log NOx-related DTCs such as P20EE, P229F, turn on the check engine light, trigger engine derate, and cause the vehicle to fail state emissions inspection. Many bus fleets and medium-duty repair shops run into intermittent faults that only appear under sustained loaded operation, which are classic symptoms of a degraded upstream NOx sensor. This sensor cross-references interchange numbers: 2872297, 5WK96692, 5WK96692A, 5293295, 5293295RX, 904-6003, 2894945 for quick part matching for fleet managers, bus maintenance crews and independent diesel repair shops across the United States.

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H2: OEM-Grade Construction & Strict Factory Testing

Our 2872297 NOx Sensor features a high-stability ceramic sensing chip, heavy-duty heat-resistant stainless steel probe housing and fully sealed wiring assembly with the 4-pin white OEM connector. It is built to survive high exhaust temperatures, continuous engine vibration, thermal cycling, heavy soot loading, plus road salt, mud and moisture exposure common on transit buses and vocational medium-duty trucks all year round. Cheap generic NOx sensors often skip long-duration high-temperature burn-in calibration, which leads to signal drift and premature failure after only a short time in service.

Every finished 2872297 NOx Sensor passes a full set of factory quality validation steps: precision NOx signal calibration, high-temperature aging cycle test, waterproof seal pressure test and connector pin continuity inspection before packing. This rigorous QC process guarantees stable NOx readings, reliable CAN communication with the ECM and longer service life inside the demanding medium-duty diesel exhaust environment.

H2: Vehicle Fitment (Amazon US Medium Duty & Bus Fitment List)

Compatible Cummins Engines: Cummins ISB6.7, ISL9, QSB6.7 EPA10 Diesel (2010–2015)

• Freightliner: M2 106, M2 112
• Blue Bird: All American FE, Vision Bus
• Gillig: Low Floor, Phantom Transit Bus
• Sterling: Acterra
• International: 4300, 4400, 4700, 4900
• Kenworth: T270, T370
• Peterbilt: 330, 337, 348

Important note: This is the 12V UPSTREAM ENGINE OUTLET NOx Sensor with 4-pin white plug. NOT compatible with 24V long-haul ISX15 heavy trucks, NOT compatible with 12V Ram 2500/3500 pickup trucks. Verify your VIN, engine model, voltage rating, connector shape and original OEM part number before placing your order. Installing the wrong NOx Sensor will result in persistent SCR faults and derate that cannot be cleared easily.

Interchange OE Numbers: 2872297, 5WK96692, 5WK96692A, 5293295, 5293295RX, 904-6003, 2894945

https://wjieco-autoparts.com/product/4326872-nox-sensor/

WJIECO 4326872 NOx Sensor Durable Cross references 4326872RX, A045S169, 5WK96749A, 5WK96749B. OEM-grade downstream NOx Sensor for 2013–2018 Dodge Ram 2500 3500 4500 5500 6.7L Cummins Diesel. SCR monitoring, plug & play install.

H2: Core Benefits of 2872297 NOx Sensor

Replacing your faulty upstream NOx Sensor with the WJIECO 2872297 NOx Sensor restores accurate engine-out NOx measurement for the SCR dosing system. Reliable upstream NOx readings allow the ECM to maintain proper DEF injection rates, clear NOx and SCR related diagnostic trouble codes, remove engine power derate restrictions, and complete emissions readiness monitors required for DOT and state inspection. For bus and medium-duty fleets, proactive replacement prevents unexpected downtime and disruptions to route schedules.

Robust, factory-calibrated construction greatly reduces early failure and intermittent fault codes that plague low-cost alternatives. This aftermarket NOx Sensor delivers OEM-matching performance at a much lower price than dealership replacement parts, making it a great fit for US transit fleets, vocational truck operators and professional medium-duty diesel repair facilities.

H2: Plug-and-Play Installation, No Dealer Programming Required

This 2872297 NOx Sensor is a true direct-fit replacement for the factory upstream engine-out NOx Sensor on Cummins ISB6.7 / ISL9 / QSB6.7 EPA10 engines. Thread size, probe length, mounting thread, 4-pin white connector profile and wiring pinout all match OEM specifications exactly. Remove the old faulty sensor, torque the new sensor to factory torque specs and reconnect the stock wiring harness. There is no wire cutting, harness modification or ECU flash programming needed. After installation, clear all associated diagnostic trouble codes with a heavy-duty diesel scan tool and perform a loaded test drive. A full drive cycle is recommended so the ECM can run its SCR self-test and reset emissions readiness status.

Every WJIECO 2872297 NOx Sensor is fully bench tested before shipment. If you need a reliable 12V upstream NOx Sensor compatible with 2872297, 5WK96692, 5293295 and 2894945 for Cummins ISB6.7 / ISL9 medium-duty trucks and buses, this WJIECO NOx Sensor will return your SCR emissions system to normal operation.

Product Tags

2872297, 5WK96692, 5WK96692A, 5293295, 5293295RX, 904-6003, 2894945, NOx Sensor, Nitrogen Oxide Sensor, Cummins ISB6.7 NOx sensor, Cummins ISL9 NOx sensor, upstream NOx sensor, Freightliner M2 NOx sensor, Blue Bird bus NOx sensor, Gillig bus NOx sensor, medium duty truck NOx sensor, WJIECO exhaust sensor