FITMENT
Compatible with Volkswagen diesel vehicles equipped with SCR (Selective Catalytic Reduction) exhaust systems requiring NOx monitoring sensor units.
Typical applications include diesel passenger cars and light commercial vehicles using OEM reference 5WK97203 / 4G0907807C.

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

Q2: Where is this sensor installed?
A2: It is mounted in the exhaust system, usually before or after the SCR catalyst depending on configuration.

Q3: What symptoms indicate a failing NOx sensor?
A3: Possible engine warning light, stored emissions-related fault codes, and unstable emissions control performance.

Q4: Is this compatible with all Volkswagen diesel models?
A4: No, compatibility depends on the exact engine and emissions system specification.