FITMENT
Compatible with Audi AG diesel vehicles equipped with SCR (Selective Catalytic Reduction) systems requiring NOx monitoring.
Common applications include Audi diesel passenger vehicles using reference SNS462 / 4G0907807AA.

FAQ
Q1: What is the function of this NOx sensor?
A1: It measures nitrogen oxide concentration in exhaust gases and sends signals to the engine control unit for 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 system configuration.

Q3: What are symptoms of failure?
A3: Engine warning light, emissions-related fault codes, and reduced SCR system efficiency.

Q4: Is it compatible with all Audi diesel models?
A4: No, compatibility depends on the exact engine and emissions system setup.