8946542170 SENSOR, OXYGEN

Premium Exhaust O2 Sensor for Toyota

Keep your engine smart and clean with this high-precision oxygen probe . It continuously measures leftover oxygen in exhaust gases and tells the engine computer how to balance fuel and air. The result is crisp throttle response, strong torque, lower emissions, and better fuel economy ⛽.

Why your engine needs it

A healthy O2 sensor lets the ECU run closed-loop control. It trims fuel in real time, protecting the catalytic converter and saving fuel. On daily drives or long trips, it keeps mixtures right, so your Toyota runs smooth and efficient .

How it works

Inside is a zirconia ceramic cell with a protective vent. As exhaust flows across the tip, the sensor generates a small voltage (about 0.1–0.9 V) based on oxygen difference. A built-in heater brings it to working temp fast. The ECU reads this signal and corrects the mixture hundreds of times per minute ✅.

What happens if it’s broken

Expect hard starts, rough idle, weak power, and high fuel use. The Check Engine Light may show O2 or heater codes, emissions may fail, and the catalyst can overheat or clog. You might smell sulfur or see dark exhaust. Ignoring it risks costly converter damage ⚠️.

Compatibility

• Rav4
• Rav4/Vanguard