FITMENT
Compatible with Volkswagen / Audi / Porsche platform diesel vehicles equipped with SCR (Selective Catalytic Reduction) systems requiring NOx monitoring.
Common applications include VW Group Euro 6 diesel engines using reference SNS308 / 5WK97308 / 4M0907807F.

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

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

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

Q4: Is it compatible with all VW Group vehicles?
A4: No, compatibility depends on engine model, emissions standard, and SCR system setup.