WJIECO 68085740AA NOx Sensor. Cross references 5WK96730, 68085740AB. 12V downstream post-SCR NOx Sensor for Ram 2500 3500 4500 5500 6.7L Cummins Diesel 2013–2015. Plug & play direct replacement.

68085740AA NOx Sensor Overview

The 68085740AA NOx Sensor manufactured by WJIECO is the downstream post-SCR NOx sensor for Ram heavy-duty trucks equipped with 6.7L Cummins ISB diesel from 2013 to 2015. This post-cat NOx sensor measures NOx levels exiting the SCR, so the ECM can confirm the SCR system is working properly and stay compliant with EPA emissions standards.

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A faulty downstream NOx sensor commonly triggers SCR efficiency codes, check engine light and engine derate. Common related DTCs include P20EE, P2201, P220A. Many Cummins Ram owners experience intermittent faults under heavy towing and work loads, which are typical signs of degraded NOx sensing element. This sensor cross-references interchange numbers: 68085740AA, 5WK96730, 68085740AB, 904-6049 for fast lookup by repair shops and diesel technicians across the USA.

H2: OEM-Grade Construction & Strict Factory Testing

Our 68085740AA NOx Sensor adopts a high-stability ceramic sensing chip, heavy-duty heat-resistant stainless steel probe housing and fully sealed wiring assembly with OEM matching connector. It is built to withstand sustained exhaust heat, engine vibration, rapid thermal cycling, soot buildup, plus road salt, mud and moisture during heavy-duty towing and work truck use. Low-cost generic NOx sensors commonly skip long-duration high-temperature burn-in calibration, which leads to unstable readings and premature failure after short service time.

Every finished 68085740AA NOx Sensor passes a full series 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 strict QC process guarantees stable NOx readings, reliable CAN communication with the ECM and extended service life inside the harsh diesel exhaust aftertreatment environment.

H2: Vehicle Fitment (Amazon US Ram 6.7 Cummins Fitment List)

Compatible Engine: 6.7L ISB Cummins L6 Turbo Diesel (2013–2015)

• Ram 2500 (2013–2015) 6.7 Cummins Diesel
• Ram 3500 (2013–2015) 6.7 Cummins Diesel
• Ram 4500 (2013–2015) 6.7 Cummins Diesel
• Ram 5500 (2013–2015) 6.7 Cummins Diesel

Important note: This is the 12V DOWNSTREAM POST-SCR POSITION 2 NOx Sensor. NOT compatible with upstream pre-SCR NOx sensor, NOT compatible with 5.9L Cummins, NOT compatible with gasoline models, NOT compatible with GM or Ford diesel trucks. Verify your VIN, engine, 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.

https://wjieco-autoparts.com/product/68067521aa-nox-sensor/

https://wjieco-autoparts.com/product/68067521aa-nox-sensor/

H2: Core Benefits of 68085740AA NOx Sensor

Replacing your faulty downstream post-SCR NOx Sensor with the WJIECO 68085740AA NOx Sensor restores accurate post-SCR NOx monitoring for the emissions control system. Reliable downstream NOx readings let the ECM verify SCR conversion efficiency, clear NOx and SCR related diagnostic trouble codes, remove engine power derate restrictions, and complete emissions readiness monitors required for state inspection. For Ram Cummins owners who tow heavy loads or run work trucks, proactive replacement prevents unexpected derate and roadside breakdowns.

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 reliable choice for US heavy-duty Ram truck owners and professional diesel repair facilities.

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

This 68085740AA NOx Sensor is a true direct-fit replacement for the factory downstream post-SCR NOx Sensor on 2013–2015 Ram 2500/3500/4500/5500 6.7 Cummins diesel. Thread size, probe length, mounting thread, 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 ECM flash programming needed. After installation, clear all associated diagnostic trouble codes with a 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 68085740AA NOx Sensor is fully bench tested before shipment. If you need a reliable 12V downstream NOx Sensor compatible with 68085740AA 5WK96730 for Ram 6.7 Cummins diesel, this WJIECO NOx Sensor will return your SCR emissions system to normal operation.

Product Tags

68085740AA, 5WK96730, NOx Sensor, Nitrogen Oxide Sensor, downstream post-scr NOx sensor, Ram 2500 Cummins NOx sensor, Ram 3500 4500 5500 NOx sensor, Cummins ISB diesel exhaust sensor, WJIECO exhaust sensor