Fitment

Fits for:

• Audi A4 (B9 / 8W) 2.0 / 3.0 TDI diesel models
• Audi A5 / A6 / A7 diesel SCR applications (platform dependent)
• Volkswagen / Audi MQB / MLB diesel vehicles with SCR (AdBlue) system
• Some VW Touareg / Passat diesel Euro 6 variants (depending on engine code)
• Engine: 2.0 TDI / 3.0 TDI diesel engines with SCR emissions system
• Position: Exhaust NOx sensor (inlet or outlet depending on SCR layout)
• OE / Cross References: 8W0907807E / 5WK97434 / SNS480 / A1028W0807BP / 70680088 / CSN73B03 / 82.3028 / IKA9.3592.1 / VW Group NOx sensor family

FAQ

Q1: Are 8W0907807E and 5WK97434 the same sensor?
A1: Yes. 8W0907807E is the Volkswagen Group OE number, and 5WK97434 is the sensor manufacturer reference used for the same NOx sensor module in SCR systems.

Q2: What vehicles use this sensor?
A2: It is commonly used on Audi A4 (B9/8W) 2.0 and 3.0 TDI diesel models and other VW Group Euro 6 SCR-equipped vehicles.

Q3: Is this inlet or outlet sensor?
A3: It can be used as inlet or outlet NOx sensor depending on exhaust configuration. Many Audi/VW SCR systems use identical sensor units in both positions.

Q4: What does this sensor do?
A4: It measures nitrogen oxide (NOx) levels in exhaust gases and sends data to the ECU, which controls AdBlue (DEF) dosing to reduce emissions and maintain SCR efficiency.