FITMENT
Compatible with Volkswagen AG diesel vehicles equipped with SCR (Selective Catalytic Reduction) systems requiring NOx monitoring.
Common applications include Audi / VW Group diesel platforms using reference 5WK96638B / 8K0907807C.

FAQ
Q1: What is the function of this NOx sensor?
A1: It measures nitrogen oxide levels in exhaust gases and sends real-time data to the ECU to control AdBlue/DEF dosing and emissions compliance.

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

Q3: What are symptoms of failure?
A3: Engine warning light, SCR system fault codes, increased emissions, and reduced engine performance or limp mode.

Q4: Is it compatible with all Volkswagen Group vehicles?
A4: No, compatibility depends on engine type, emissions standard (Euro 5/Euro 6), and SCR system setup.