Rear Heated O2 Sensor

Why This Sensor Matters

The rear heated oxygen sensor keeps your motor healthy by tracking exhaust gases before they exit the tailpipe. It checks how well your catalytic converter is functioning and helps the engine control system adjust air-fuel balance for optimal performance and low emissions.

How This Sensor Works

This sensor uses a ceramic tip to measure oxygen in your exhaust. The integrated heater warms up the sensor quickly, ensuring accurate readings right after you start your vehicle—even on cold days. Your car’s computer relies on this data to maintain proper fuel trim.

What Happens If It Fails

• Increased fuel consumption
• Rough engine idle or hesitation
• Emission test failure
• Check Engine light illumination
• Potential catalytic converter damage

Compatibility

• QX60
• JX