Audi Q3/Q5 and Volkswagen models NOx sensor 04L907805L 5WK97233 precise exhaust emission detection

Audi Q3, Q5 and corresponding VW models’ NOx sensor, OEM 04L907805L, compatible with 5WK97233, installed near the SCR catalyst in the exhaust pipe. Real-time monitoring of exhaust nitrogen oxides and feedback to the engine control unit to precisely optimize urea injection and ensure emissions compliance. Fits many models with 2.0TDI or 2.0TSI engines. Installation difficulty is medium; labor 0.5-1 hour; pay attention to wiring harness fixed position. If the vehicle shows “Check Engine” light or emission fault codes, inspect promptly.