丰田威驰/雅力士后氧传感器 89465-52370 原厂规格，精准排放监测

Toyota Yaris/Vitz rear oxygen sensor, OEM 89465-52370, installed behind the catalytic converter in the exhaust system. Monitors exhaust oxygen content and feeds back to the ECU to precisely adjust air-fuel ratio, ensuring emissions compliance and fuel efficiency. Fits a wide range of Toyota models; installation difficulty is medium; labor about 0.5-1 hour; during removal/install avoid thread damage. If check engine light is on, fuel consumption increases, acceleration declines, or there is exhaust odor, replace sensor promptly.