Fitment (Market-Validated Usage)

Based on OEM cross-reference catalogs and aftermarket listings, this NOx sensor is used in Volkswagen Group diesel SCR (AdBlue) systems associated with the 8K platform (Audi B8 generation).

Common system applications include:

• Audi A4 B8 2.0 TDI (EA189 / early EA288 depending on revision)
• Audi A5 8T 2.0 TDI diesel variants
• Audi A6 C7 2.0 TDI (selected configurations)
• Audi Q5 8R 2.0 TDI diesel variants
• SCR (AdBlue) Euro 5 / Euro 6 diesel emission systems

Fitment is strictly based on OE number matching: 8K0907807T / 5WK96796

OE cross-reference data confirms this NOx sensor belongs to the VAG 8K0-series SCR sensor family used across Audi longitudinal diesel platforms.
Marketplace listings also show this OE number paired with 5WK96796 VDO/Continental sensor module applications.

Technical Description

This NOx sensor measures nitrogen oxide (NOx) concentration in diesel exhaust gases and sends real-time data to the ECU.

It is part of the SCR (Selective Catalytic Reduction) system, which uses AdBlue injection to reduce NOx emissions and maintain Euro emissions compliance.

Designed for high-temperature exhaust environments with integrated electronics and CAN communication to the engine control unit.

Symptoms / Fault Codes

• Check engine light
• SCR / AdBlue system warning
• P2200 / P229F fault codes (system dependent)
• Reduced engine power (limp mode)
• Increased emissions

OE / Part Numbers

• 8K0907807T
• 5WK96796
• 8K0 907 807 T (format variant)

FAQ

Is this sensor vehicle-specific?

Yes. NOx sensors must match the exact OE number. Even small suffix differences (T / N / Q variants) can indicate different calibration or installation position.

Why do Audi and Volkswagen appear in cross-reference listings?

Because Volkswagen Group shares SCR diesel technology across multiple platforms, and aftermarket catalogs group them under shared OE families.

Can similar OE numbers be used instead?

Not recommended. NOx sensors are ECU-calibrated components and must match exact OE specification.