Fitment

Based on OE cross-reference usage, this NOx sensor is commonly used in Volkswagen Group diesel SCR (AdBlue) systems on V6 TDI platforms.

Typical applications include:

• Volkswagen Touareg (7P) 3.0 V6 TDI diesel
• Audi A4 / A6 / A7 (3.0 TDI V6 diesel, selected EA897 platform variants)
• Audi Q5 / Q7 (selected V6 TDI diesel configurations depending on year and engine code)
• SCR (AdBlue) exhaust aftertreatment systems

Fitment is strictly based on OE number matching: 8K0907807K / 5WK96689A

Technical Description

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

It is part of the SCR (Selective Catalytic Reduction) system and is used to regulate AdBlue injection strategy, ensuring emissions compliance in diesel engines.

The sensor is an integrated electronic unit designed for high-temperature exhaust environments and continuous emissions monitoring.

Symptoms / Fault Codes

Common symptoms of a failing NOx sensor may include:

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

OE / Part Numbers

• 8K0907807K
• 5WK96689A
• 8K0 907 807 K (format variant)

FAQ

What does this NOx sensor do?

It measures nitrogen oxide levels in diesel exhaust and sends data to the ECU for SCR emission control.

Is this sensor vehicle-specific?

Yes. Compatibility is strictly determined by OE number matching. Even small suffix differences (K / F / N / D) may indicate different ECU calibration or sensor position.

Which vehicles use this part?

It is commonly used on Volkswagen Touareg 3.0 TDI and Audi V6 TDI models such as A4, A6, A7, Q5, and Q7 depending on engine configuration.

Can similar NOx sensors be used instead?

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