Volkswagen Series Oxygen Sensor 22690-AA570 Crankcase Ventilation System Component

For Volkswagen group models like Passat, Magotan, and Sagitar, the exhaust manifold or pipe oxygen sensor 22690-AA570 monitors exhaust oxygen content in real time and feeds signals to the engine control unit to precisely adjust the air-fuel ratio, ensuring combustion efficiency. Fits many VW models; installation difficulty medium; labor about 0.5-1 hour; beware of damaging threads during removal. If idle instability, significantly increased fuel consumption, engine check light on, or exhaust exceeds standard, sensor aging or failure is indicated; replace promptly.