Toyota Prius Rear Oxygen Sensor

This Toyota Prius rear oxygen sensor is installed in the exhaust system after the catalytic converter. It measures the oxygen level in exhaust gases and sends feedback to the engine control unit (ECU) for accurate emission control and fuel mixture adjustment.

The sensor helps ensure proper catalytic converter performance by monitoring how effectively exhaust gases are being processed. It plays an important role in reducing emissions, improving fuel efficiency, and maintaining smooth engine operation.

In Toyota Prius hybrid systems, oxygen sensors work continuously with the ECU to optimize combustion efficiency and support eco-friendly driving performance while meeting emission standards.

This unit is commonly available as a used imported part and is preferred for its original sensor accuracy, proper ECU compatibility, and reliable long-term performance compared to aftermarket alternatives.