Toyota Vios/Yaris oxygen sensor 89465-52380A OEM standard

In Toyota Vios and Yaris, exhaust pipe front end before catalytic converter houses oxygen sensor OEM 89465-52380A (also compatible with 89465-52370). Monitors exhaust oxygen content and feeds signal to ECU to precisely control air-fuel ratio for efficient combustion. Installation difficulty medium; labor 30–45 minutes; requires use of special socket. If idle is unstable, fuel consumption rises, acceleration weak, or engine warning lamp on, the sensor is aging or failed.