Ford Explorer 3.5T 2012 Model Rear Oxygen Sensor BH6Z-9G444-A Air-Fuel Ratio Enhancement

2012-2015 Ford Explorer 3.5T rear oxygen sensor BH6Z-9G444-A as a precise replacement when idle is unstable, fuel consumption rises, or check engine light is on. Installed in the rear exhaust near the catalytic converter; monitors exhaust oxygen content and feeds ECU to precisely adjust air-fuel ratio, ensuring engine runs at optimal condition and improves fuel economy. Installation difficulty medium; about 1 hour; avoid damaging threads during removal.