Toyota Yaris Rear Oxygen Sensor 89465-20810 Stable Signal No Error

After 2005-2011 Toyota Yaris 1.3L and 1.5L models, rear oxygen sensor OEM number 89465-20810, also compatible with Vios, Xiangyi on the same platform. It monitors exhaust oxygen content, provides stable signals to the ECU to ensure precise air–fuel ratio, and prevents check engine lights from false alarms and abnormal fuel consumption. Replace with a dedicated sleeve to avoid harness strain; recommended every 80,000-100,000 km to maintain exhaust system optimal condition.