Air-Fuel Ratio Monitoring Sensor

Why You Need This Sensor

Accurate air-fuel mixture is vital for a healthy engine and optimal fuel economy. This essential sensor measures the ratio of oxygen in the exhaust, helping the engine control unit (ECU) fine-tune combustion for lower emissions and better performance.

How It Works

Installed in the exhaust manifold, the sensor delivers real-time data on the exhaust’s oxygen levels. These readings guide the ECU to adjust fuel injection, ensuring the engine runs efficiently in any conditions. With correct air-fuel balance, you get reliable starts, smoother running, and cleaner exhaust.

What If It Fails

A faulty sensor means poor fuel efficiency, sluggish acceleration, and increased emissions. The check engine light will likely come on, and prolonged issues can damage the catalytic converter or even lead to costly repairs.

Compatible Models

• Corolla Sed/Wg
• Corolla/Altis
• Corolla/Altis Sed/Wg
• Vios
• Yaris
• Yaris/Vios/Limo