WJIECO 2872942 NOx Sensor Durable Cross references 5WK96749B. OEM-grade downstream NOx Sensor for 2013–2018 Dodge Ram 2500 3500 4500 5500 6.7L Cummins Diesel. SCR efficiency monitoring, plug & play install.

2872942 NOx Sensor Overview

The 2872942 NOx Sensor manufactured by WJIECO is the downstream feedback sensor for the SCR emissions system on US-spec Dodge Ram heavy-duty trucks equipped with the 6.7L Cummins diesel engine. Mounted after the SCR catalyst, this NOx Sensor measures residual NOx gas after DEF reacts inside the catalyst.

The ECM compares readings from this downstream NOx Sensor against the upstream NOx Sensor to calculate SCR conversion efficiency. If the sensor drifts, fails or stops communicating, the ECU will log SCR efficiency fault codes, trigger the check engine light, activate engine derate and cause the vehicle to fail official emissions inspections. Many diesel mechanics encounter intermittent trouble codes triggered by soot contamination or thermal fatigue of aging downstream NOx Sensors, which often only surface under sustained highway operating conditions. This sensor cross-references interchange numbers: 2872942, 5WK96749B for fast parts lookup for DIY truck owners, repair shops and commercial fleets.

https://www.amazon.com/dp/B0FHKGJQ1W

H2: OEM-Grade Construction & Strict Factory Testing

Our 2872942 NOx Sensor uses a high-precision stable ceramic sensing chip, heavy-duty heat-resistant stainless housing and fully sealed wiring harness. It is engineered to withstand sustained high exhaust temperatures, constant engine vibration, rapid thermal shock, soot buildup, road salt and moisture exposure throughout all seasons across North America. Budget aftermarket NOx Sensors commonly skip long-term calibration aging tests, leading to signal drift and premature failure after just a few thousand miles.

Every finished 2872942 NOx Sensor passes a full series of factory quality checks: precise signal calibration, high-temperature aging test, waterproof seal inspection and connector continuity testing before packing. This strict QC workflow ensures stable NOx measurement, reliable ECU communication and extended service life inside the harsh diesel exhaust aftertreatment assembly.

H2: Vehicle Fitment (US Market Fitment List)

Standard US 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 DOWNSTREAM NOx Sensor. Do not mix it up with the upstream NOx Sensor (2872948 / 4326873). Confirm your VIN, installation position after the SCR canister and original OEM part number before purchase. Installing the wrong upstream/downstream NOx Sensor will create persistent SCR monitoring errors.

Interchange OE Numbers: 2872942, 5WK96749B

https://wjieco-autoparts.com/product/4326873-nox-sensor/

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.

H2: Core Benefits of 2872942 NOx Sensor

Replacing your defective downstream NOx Sensor with the WJIECO 2872942 NOx Sensor restores closed-loop SCR efficiency monitoring. Accurate post-catalyst NOx readings allow the ECU to verify that the SCR and DEF dosing system are working properly, clear SCR efficiency related DTCs, remove engine power derate restrictions and complete emissions readiness monitors for state inspection. For fleet operators, timely replacement prevents unexpected roadside shutdowns and costly missed work schedules.

Robust, well-calibrated construction greatly reduces early failure and intermittent fault codes common on low-cost alternatives. This aftermarket NOx Sensor delivers OEM-equivalent performance at a much lower cost than dealership replacement parts, ideal for US fleet operators, DIY Ram owners and professional diesel repair shops.

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

This 2872942 NOx Sensor is a true direct-fit replacement for the factory downstream NOx Sensor on Ram 6.7 Cummins trucks. Thread pitch, mounting dimensions, connector profile and wiring pinout all match OEM specifications exactly. Remove the old faulty sensor, torque the new sensor properly and reconnect the stock wiring harness. No wire cutting, harness modification or ECU flash programming is required. After installation, clear all related diagnostic trouble codes with a heavy-duty OBD scan tool and complete an extended test drive. A full drive cycle is recommended so the ECM can run its built-in SCR efficiency self-test and reset emissions readiness status.

Every WJIECO 2872942 NOx Sensor is fully bench tested before shipment. If you need a reliable downstream NOx Sensor compatible with 2872942 and 5WK96749B for your 2013–2018 Ram 6.7 Cummins, this WJIECO NOx Sensor will restore your SCR emissions system to normal working condition.

Product Tags

2872942, 5WK96749B, NOx Sensor, Nitrogen Oxide Sensor, Ram 6.7 Cummins NOx sensor, Dodge Ram downstream NOx sensor, diesel SCR NOx sensor, WJIECO exhaust sensor