Fitment
Compatible with Volkswagen Group / Audi / Bentley Euro 6 diesel SCR (AdBlue) systems

Vehicle applications include:
Audi Q7
Audi Q8
Volkswagen Touareg
Bentley Bentayga

Other VW Group vehicles using OEM part number 4M0907807S / 5WK97494 / SNS-type sensors

FAQ

Q1: What is the function of this NOx sensor?
A1: It measures nitrogen oxide levels in diesel exhaust and sends data to the SCR system to control AdBlue (DEF) injection and reduce emissions.

Q2: Is 4M0907807S the same as 5WK97494?
A2: Yes, 4M0907807S is the OEM VW/Audi number and 5WK97494 is the Continental aftermarket reference for the same sensor family.

Q3: Where is this sensor installed?
A3: It is installed in the exhaust aftertreatment system, typically as an SCR inlet or outlet NOx sensor depending on vehicle configuration.

Q4: Which engines commonly use it?
A4: It is mainly used on VW Group 3.0 TDI and 4.0 TDI diesel engines with SCR/AdBlue systems (MLB EVO platform).

Q5: What are common failure symptoms?
A5: Engine warning light, AdBlue/SCR faults, NOx signal errors, or limp mode activation.