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

Vehicle applications include:
Audi A3
Audi Q2
Seat Ateca
Skoda Karoq
Volkswagen Golf
Volkswagen T-Roc
Other VW Group MQB diesel platforms using OEM part numbers 04L907807AD / 5WK97313 / 8R0907807G

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

Q3: Are all listed part numbers interchangeable?
A3: They are cross-reference or variant numbers within the same sensor family, but exact OEM matching is still required for correct calibration.

Q4: Is this used across MQB platforms?
A4: Yes, it is widely used in MQB 2.0 TDI vehicles including Audi, VW, Seat, and Skoda models.

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