WJIECO 4326873 NOx Sensor Durable Cross references 5WK96742B, 2872948. OEM-grade upstream NOx Sensor for 2013–2018 Dodge Ram 2500 3500 4500 5500 6.7L Cummins Diesel. SCR system control, plug & play install.

4326873 NOx Sensor Overview

The 4326873 NOx Sensor manufactured by WJIECO is a core component of the SCR emission system on US-spec Dodge Ram heavy-duty trucks with 6.7L Cummins diesel engines. Mounted upstream (before the SCR catalyst), this precision nitrogen oxide sensor continuously detects NOx concentration in exhaust gas and transmits real-time data to the engine control module.

The ECU uses these upstream NOx readings to calculate the correct DEF injection rate for the SCR system. A faulty NOx Sensor will trigger check engine lights, NOx-related fault codes, disable SCR functions, force engine power derate and lead to failed emissions tests. Many Ram owners run into frustrating intermittent codes that come and go after a hard drive, which is a classic sign of a worn NOx Sensor with drifting signal output. This sensor cross-references interchange numbers: 4326873, 5WK96742B, 2872948 for fast parts lookup and replacement for Ram owners, shops and fleets.

https://www.amazon.com/dp/B0FHJ1LJ4X

H2: OEM-Grade Construction & Strict Factory Testing

Our 4326873 NOx Sensor uses a high-stability ceramic sensing chip, heavy-duty corrosion-resistant housing and sealed wiring assembly designed to survive hot exhaust gas, continuous vibration, thermal cycling and road salt exposure. Cheap aftermarket NOx Sensors often cut corners on chip calibration or wire sealing, which leads to early failure in wet, icy winter road conditions common across the USA.

Every finished NOx Sensor goes through full factory calibration, signal accuracy testing, aging test, waterproof and connector continuity inspection before packing. This rigorous QC process ensures consistent NOx measurement, stable communication with ECU and long service life in harsh diesel aftertreatment environments.

https://wjieco-autoparts.com/product/2872942-5wk96749/

H2: Vehicle Fitment (US Market Amazon Fitment List)

Standard US Amazon fitment format, matches Cummins / Ram OEM catalog:

• Dodge Ram 2500 6.7L Cummins Diesel (MY 2013–2018, US Spec)
• Dodge Ram 3500 6.7L Cummins Diesel (MY 2013–2018, US Spec)
• Dodge Ram 4500 6.7L Cummins Diesel (MY 2013–2018, US Spec)
• Dodge Ram 5500 6.7L Cummins Diesel (MY 2013–2018, US Spec)

Important note: This is the UPSTREAM NOx Sensor. Verify your VIN, location (before SCR) and original OEM part number before purchase; downstream NOx Sensor uses a different part number. Mixing up upstream and downstream NOx Sensors will cause permanent SCR errors.

Interchange OE Numbers: 4326873, 5WK96742B, 2872948

H2: Core Benefits of 4326873 NOx Sensor

Replacing your failed upstream NOx Sensor with the WJIECO 4326873 NOx Sensor restores proper SCR and DEF dosing control. Accurate upstream NOx readings let the ECU dose DEF correctly, lower NOx emissions, clear NOx diagnostic trouble codes, remove engine derate and pass emission inspections. For fleet trucks, fixing a bad NOx Sensor quickly prevents costly downtime and missed delivery schedules.

Robust construction reduces early sensor failure and intermittent codes common with cheap alternatives. This aftermarket NOx Sensor delivers OEM matching performance at much lower cost than dealer parts, ideal for US fleet operators, DIY Ram owners and professional diesel repair shops.

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

This 4326873 NOx Sensor is a true direct-fit replacement for the factory unit on Ram 6.7 Cummins. Connector, thread, mounting position and wiring pinout all match OEM specs exactly. Remove the old sensor, install the new one, reconnect the harness. No wire splicing, harness modification or ECU flash/programming needed. After install, clear related DTCs with a compatible OBD scan tool and test drive to confirm normal operation. It is recommended to let the truck complete a full drive cycle to confirm readiness monitors reset fully.

Every WJIECO 4326873 NOx Sensor is fully tested before shipment. If you need a reliable upstream NOx Sensor compatible with 4326873, 5WK96742B, 2872948 for your 2013–2018 Ram 6.7 Cummins, this WJIECO NOx Sensor is the right choice to get your truck back to normal operation.

Product Tags

4326873, 5WK96742B, 2872948, NOx Sensor, Nitrogen Oxide Sensor, Ram 6.7 Cummins NOx sensor, Dodge Ram NOx sensor, diesel SCR NOx sensor, WJIECO exhaust sensor