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

• Porsche Cayenne (92A / 958 3.0 TDI diesel SCR variants depending on engine code)
• Volkswagen Touareg (7P 3.0 TDI diesel SCR variants)
• Audi Q7 (4L 3.0 TDI diesel SCR variants)
• Shared VW Group V6 3.0 TDI SCR Euro 5 / Euro 6 platforms

OEM / CROSS REFERENCES

• 059907807L (OEM VAG part number)
• 5WK97230 (Continental/VDO sensor cross-reference)
• SNS450 / SNS453 family (variant depending on position and revision)
• Related SCR NOx sensor system used across VW Group V6 diesel engines

FUNCTION
This NOx sensor is part of the SCR exhaust aftertreatment system. It measures nitrogen oxide (NOx) levels in the exhaust and sends data to the ECU to control AdBlue (DEF) injection, ensuring emissions compliance and optimal catalytic efficiency.

FAQ
Q1: What is the function of this NOx sensor?
It measures nitrogen oxide levels in the exhaust and helps regulate AdBlue dosing to reduce emissions.

Q2: Where is it installed?
In the SCR system on the exhaust line, typically before or after the catalytic converter depending on vehicle setup.

Q3: Symptoms of failure?

• Check engine light
• SCR / AdBlue warning messages
• NOx sensor fault codes (P2200–P229F range common)
• Reduced power or limp mode

Q4: Are 059907807L and 5WK97230 interchangeable?
Yes, 059907807L is the OEM VW/Audi/Porsche reference and 5WK97230 is the supplier cross-reference for the same NOx sensor unit, but correct fitment depends on engine code and ECU calibration.