The Oxygen Sensor Upstream Lambda O2 89467-30050, a direct-fit part from IWOKPHD, is engineered to restore precise air-fuel measurement for your Toyota Yaris and select Lexus models. This upstream (pre-cat) O2 sensor uses a heating-type, piezoelectric design to deliver fast response and reliable readings of the exhaust gas, helping your engine optimize fuel delivery, reduce emissions, and maintain smooth performance even on cold starts. Its an OEM-equivalent replacement compatible with multiple part numbers including 89467-30050, 89467-22040, 89467-22050, and 234-9129, ensuring a confident fit across your vehicle applications.

Why this matters: a healthy upstream oxygen sensor is essential for accurate fuel trimming, efficient combustion, and compliant emissions. By providing a consistent lambda signal, it supports stable idle, improved throttle response, and better overall engine efficiency across varying driving conditions. Built to endure th