FITMENT
Compatible with Volkswagen AG and Audi AG diesel vehicles equipped with SCR (Selective Catalytic Reduction) systems requiring NOx monitoring.
Common applications include VW / Audi diesel engines using reference 5WK96737 / 03L907807AF.

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

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

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 VW/Audi vehicles?
A4: No, compatibility depends on engine type, emissions standard (Euro 5/Euro 6), and SCR system configuration.