FITMENT
Compatible with Volkswagen Group diesel vehicles equipped with SCR (Selective Catalytic Reduction) AdBlue emission systems requiring NOx monitoring.
Common applications include:

• Audi Q7 (4L 3.0 TDI diesel SCR variants 2009–2015)
• Volkswagen Touareg (7P 3.0 TDI diesel SCR variants 2010–2016)
• Porsche Cayenne diesel (shared VAG platform SCR variants depending on engine code)
• Euro 5 / Euro 6 diesel SCR exhaust aftertreatment systems

Using reference numbers:

• 059907807G (OEM VAG part number)
• 5WK96685A (Continental/VDO sensor cross-reference)
• Related SCR NOx sensor family used across VW Group diesel platforms

This sensor is mounted in the SCR exhaust system and monitors nitrogen oxide (NOx) levels to regulate AdBlue dosing and ensure emissions compliance.

FAQ
Q1: What is the function of this NOx sensor?
A1: It measures nitrogen oxide (NOx) in the exhaust system and sends real-time data to the ECU to control AdBlue injection and reduce emissions.

Q2: Where is it installed?
A2: It is installed in the SCR exhaust system, typically upstream or downstream of the catalytic converter depending on vehicle configuration.

Q3: What are symptoms of failure?
A3: Check engine light, SCR/AdBlue warnings, NOx sensor fault codes, reduced engine power, or limp mode activation.

Q4: Are 5WK96685A and 059907807G interchangeable?
A4: Yes, 059907807G is the OEM VW/Audi reference and 5WK96685A is the supplier cross-reference for the same NOx sensor unit, but final compatibility depends on engine code and ECU calibration.