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

Vehicle applications include:
Volkswagen Caddy
Volkswagen Tiguan
Audi A3
Audi A4
Audi A5
Other VW Group MQB/MLB diesel platforms using OEM part numbers 04L907805P / 04L907805AS / 5WK97239

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: Are 04L907805P, 04L907805AS, and 5WK97239 interchangeable?
A2: They are cross-reference OEM and Continental numbers within the same sensor family, but exact matching is still required due to calibration differences.

Q3: Where is this sensor installed?
A3: It is installed in the exhaust aftertreatment system, typically upstream or downstream of the SCR catalyst depending on vehicle configuration.

Q4: Is this used across multiple VW platforms?
A4: Yes, it is widely used across MQB/MLB diesel vehicles such as Caddy, Tiguan, Audi A3, A4, and A5.

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