Air‑Fuel Ratio Sensor for Toyota Engines ?

Keep your Toyota running clean and strong with a premium air‑fuel ratio sensor (wideband upstream O2). This part is crucial for accurate mixture control, better fuel economy, stable idle, and low emissions. Installed ahead of the catalytic converter, it lets the ECU keep the mix near stoichiometric for smooth power and long catalyst life. ⛽?

Why you need it

The sensor constantly reports exhaust oxygen so the ECU can trim injectors in closed loop. The result: fast starts, crisp throttle, reduced fuel use, and compliant emission levels.

How it works

A heated planar zirconia cell compares exhaust O₂ to reference air. The ECU reads the pump‑current signal to know rich/lean status in real time and adjusts fuel delivery instantly. The built‑in heater brings the element to operating temp quickly for accurate data even on cold mornings. ⚙️

When it fails ⚠️

Expect rough idle, poor MPG, flat acceleration, black soot or sulfur smell, and a Check Engine light (rich/lean codes). Prolonged faults can overheat and damage the catalytic converter and increase emissions.

Tech tips ?

Install upstream, thread by hand first, use O₂‑safe anti‑seize, torque to spec, don’t twist the lead, clear codes, and complete a drive cycle to verify fuel trims.

Compatibility

• Land Cruiser