WJIECO 4K0907807R NOx Sensor. Cross references Bosch 0281008301, 0281008302, 4K0907807Q. 12V downstream post-SCR NOx Sensor for Audi A6 A7 Q7 Q8 3.0L TDI Diesel 2019–2023. Plug & play direct replacement.

4K0907807R NOx Sensor Overview

4K0907807R NOx Sensor manufactured by WJIECO is the downstream post-SCR NOx sensor for Audi A6 C8, A7 C8, Q7 and Q8 3.0L TDI diesel from 2019 to 2023. This post-cat NOx sensor measures NOx levels leaving the SCR, so the ECU can confirm the SCR system is working properly and stay compliant with EPA emissions rules.

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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 modern Audi TDI owners experience intermittent faults under highway cruising and towing loads, which are typical signs of degraded NOx sensing element. This sensor cross-references interchange numbers: 4K0907807R, 0281008301, 0281008302, 4K0907807Q, 4K0907807P for fast lookup by repair shops and diesel technicians across the USA.

H2: OEM-Grade Construction & Strict Factory Testing

Our 4K0907807R 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 highway driving and towing. 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 4K0907807R 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 ECU and extended service life inside the harsh diesel exhaust aftertreatment environment.

H2: Vehicle Fitment (Amazon US Audi 3.0 TDI EA897 Fitment List)

Compatible Engine: 3.0L V6 TDI Turbo Diesel EA897 (2019–2023)

• Audi A6 C8 (4A2 / 4AH) 3.0 TDI (2019–2023)
• Audi A7 C8 (4K2 / 4KA) 3.0 TDI (2019–2023)
• Audi Q7 4M 3.0 TDI (2019–2023)
• Audi Q8 4MN 3.0 TDI (2019–2023)

Important note: This is the 12V DOWNSTREAM POST-SCR NOx Sensor. NOT compatible with upstream inlet NOx sensor, NOT compatible with 2.0 TDI models, NOT compatible with gasoline models, NOT compatible with GM, Ford or Ram 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 4K0907807R NOx Sensor

Replacing your faulty downstream post-SCR NOx Sensor with the WJIECO 4K0907807R NOx Sensor restores accurate post-SCR NOx monitoring for the emissions control system. Reliable downstream NOx readings let the ECU 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 late-model Audi TDI owners who tow and travel long distances, 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 Audi luxury TDI owners and professional diesel repair facilities.

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

This 4K0907807R NOx Sensor is a true direct-fit replacement for the factory downstream post-SCR NOx Sensor on Audi A6 A7 Q7 Q8 3.0 TDI 2019–2023. 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 ECU 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 ECU can run its SCR self-test and reset emissions readiness status.

Every WJIECO 4K0907807R NOx Sensor is fully bench tested before shipment. If you need a reliable 12V downstream NOx Sensor compatible with 4K0907807R 0281008301 for Audi A6 A7 Q7 Q8 3.0 TDI, this WJIECO NOx Sensor will return your SCR emissions system to normal operation.

Product Tags

4K0907807R, 0281008301, 0281008302, NOx Sensor, Nitrogen Oxide Sensor, downstream post-scr NOx sensor, Audi A6 C8 TDI NOx sensor, Audi A7 TDI NOx sensor, Audi Q7 Q8 TDI NOx sensor, EA897 diesel exhaust sensor, WJIECO exhaust sensor

https://wjieco-autoparts.com/product/059907807g-nox-sensor/

WJIECO 059907807G NOx Sensor Durable. Cross references 5WK96685A, 059907807B, 059907807F. 12V downstream post-SCR NOx Sensor for Audi Q7, VW Touareg, Porsche Cayenne TDI Diesel 2009–2014. Plug & play direct replacement. – WJIECO