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

Vehicle applications include:
Audi A6
Audi A7 Sportback
Other VW Group 4G platform diesel vehicles using OEM part numbers 4G0907807J / 5WK97212

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) dosing and reduce emissions.

Q2: Where is this sensor installed?
A2: It is installed in the exhaust aftertreatment system, typically upstream or downstream of the SCR catalyst depending on engine configuration.

Q3: Are 4G0907807J and 5WK97212 interchangeable?
A3: Yes, 4G0907807J is the OEM Audi/VW number and 5WK97212 is the Continental aftermarket reference for the same sensor family.

Q4: Is this only for A6 and A7?
A4: It is mainly used on Audi A6 C7 facelift and A7 Sportback diesel SCR systems (2014–2018).

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