WJIECO 68067521AA NOx Sensor Durable. Cross references 5WK96684A, 68067521AB. 12V upstream pre-SCR NOx Sensor for Ram 2500 3500 4500 5500 6.7L Cummins Diesel 2011–2012. Plug & play direct replacement.

68067521AA NOx Sensor Overview

The 68067521AA NOx Sensor manufactured by WJIECO is the upstream pre-SCR NOx sensor for Ram heavy-duty trucks equipped with 6.7L Cummins ISB diesel from 2011 to 2012. This pre-cat NOx sensor reads engine-out NOx before the SCR, allowing the ECM to calculate correct DEF injection volume and keep emissions within EPA standards.

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A faulty upstream NOx sensor commonly triggers DEF dosing codes, check engine light and engine derate. Common related DTCs include P20EE, P2200, P2209. 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: 68067521AA, 5WK96684A, 68067521AB for fast lookup by repair shops and diesel technicians across the USA.

H2: OEM-Grade Construction & Strict Factory Testing

Our 68067521AA 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 68067521AA 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)

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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.

Compatible Engine: 6.7L ISB Cummins L6 Turbo Diesel (2011–2012)

• Ram 2500 (2011–2012) 6.7 Cummins Diesel
• Ram 3500 (2011–2012) 6.7 Cummins Diesel
• Ram 4500 (2011–2012) 6.7 Cummins Diesel
• Ram 5500 (2011–2012) 6.7 Cummins Diesel

Important note: This is the 12V UPSTREAM PRE-SCR POSITION 1 NOx Sensor. NOT compatible with downstream post-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.

H2: Core Benefits of 68067521AA NOx Sensor

Replacing your faulty upstream pre-SCR NOx Sensor with the WJIECO 68067521AA NOx Sensor restores accurate engine-out NOx measurement for the DEF 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 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 68067521AA NOx Sensor is a true direct-fit replacement for the factory upstream pre-SCR NOx Sensor on 2011–2012 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 68067521AA NOx Sensor is fully bench tested before shipment. If you need a reliable 12V upstream NOx Sensor compatible with 68067521AA 5WK96684A for Ram 6.7 Cummins diesel, this WJIECO NOx Sensor will return your SCR emissions system to normal operation.

Product Tags

68067521AA, 5WK96684A, NOx Sensor, Nitrogen Oxide Sensor, upstream pre-scr NOx sensor, Ram 2500 Cummins NOx sensor, Ram 3500 4500 5500 NOx sensor, Cummins ISB diesel exhaust sensor, WJIECO exhaust sensor