Oxygen Sensor Upstream Air Fuel Ratio Lambda O2 For Toyota Yaris

Upgrade your Toyota Yaris and compatible Lexus models with the Oxygen Sensor Upstream Air Fuel Ratio Lambda O2. This upstream (front) oxygen sensor plays a crucial role in maintaining the right air-to-fuel balance, delivering precise lambda and oxygen readings to your vehicle’s ECU. By ensuring a clean, accurate signal, it helps your engine achieve smoother idling, better fuel economy, and lower emissions. Built to endure daily driving, this sensor is designed for fast warm-up and stable performance across a range of operating temperatures, so your engine runs efficiently from startup through highway cruising.

Compatible with Toyota Yaris 2012–2018 and select Lexus models (GS350, GS450H, IS250, IS350, 2013–2014), this sensor covers multiple OEM references (including 89467-22040, 89467-22050, 89467-30050, and 234-9129) to fit a variety of installations. It features a piezoelectric sensing element with heating capability, offering quicker temperature stabilization which helps reduce sensor delay and ECU learning time. Originating from Mainland China and manufactured by IWOKPHD, this upstream sensor is a reliable choice when replacing worn or faulty oxygen sensors that impact performance and emissions.

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Benefits & Tips

• Maintain optimal fuel efficiency by ensuring the ECU receives accurate air-fuel ratio data during both cold starts and steady cruising.
• Reduce emissions and protect your catalytic converter by preventing rich or lean running conditions caused by a degraded upstream sensor.
• Use as a reliable replacement for worn OEM units when your Yaris or Lexus shows symptoms like rough idle, hesitation, or fluctuating fuel trims.

Product specifications

• Brand: IWOKPHD
• Part numbers / OEM references: 89467-22040, 89467-22050, 89467-30050, 234-9129 (and variants listed in descriptions)
• Sensor type: Piezoelectric with heating element
• Function: Upstream/front oxygen sensor (Lambda O2)
• Measuring range: Upstream Front Probe Air Fuel Ratio Lambda O2
• Compatible vehicles: Toyota Yaris (2012–2018); Lexus GS350 (2013–2014); Lexus GS450H (2013–2014); Lexus IS250 (2013); Lexus IS350 (2013)
• Origin: Mainland China

Package includes:

• 1 x Oxygen Sensor Upstream Front Probe (Lambda O2) for Toyota Yaris and supported Lexus models

Warnings/Reminders

• Please check the part number carefully to ensure the correct fit for your vehicle.
• If you’re unsure which item fits your car, provide the part number or original product photos so we can confirm within 24 hours.
• The only way to be 100% sure of fit is to compare with your original part.