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

Vehicle applications include:
Skoda Superb
Volkswagen Golf
Volkswagen Passat
Volkswagen Arteon
Seat Ateca
Audi A3
Audi Q2
Other VW Group MQB diesel platforms using OEM part numbers 04L907807ER / 04L907807AD

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 vehicle configuration.

Q3: Are 04L907807ER and 04L907807AD interchangeable?
A3: They are OEM variant/revision numbers within the same sensor family, but exact matching is required due to calibration differences.

Q4: Is this used across multiple MQB vehicles?
A4: Yes, it is widely used across MQB 2.0 TDI platforms such as Golf, Passat B8, Superb, Arteon, Ateca, A3, and Q2.

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