Oxygen Sensor Downstream for Toyota Sienna 2004-2010
Upgrade your Toyota Sienna’s exhaust monitoring with this downstream Oxygen Sensor (O2 sensor) designed for 2004–2010 models. This sensor sits after the catalytic converter, providing essential feedback to the engine control unit to help balance fuel delivery, reduce emissions, and maintain optimal engine performance. Built to match the Sienna’s original specifications, it supports multiple compatible part numbers and engine configurations, giving you a reliable replacement that keeps your vehicle running cleanly and efficiently.
Compatibility is specifically confirmed for Toyota Sienna models including 2004–2006 3.3L V6 and 2007–2010 3.5L V6, covering downstream right (2007–2010, FWD) and downstream rear (2004–2006, FWD) positions. The sensor accommodates the following part numbers: 89465-08030, 89465-08070, and 234-4516, with variants listed as 8946508030, 8946508070, and 2344516 among others. This ensures a direct, OE-like fit that supports proper mounting, electrical connection, and sensor response for reliable operation.
Manufactured to meet the needs of modern V6 Sienna owners, this downstream O2 sensor carries a two-year replacement warranty and is ready to install, giving you a practical, long‑term solution for emissions compliance and smooth engine performance.
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Benefits & Tips
- Restores proper exhaust gas monitoring after the catalytic converter, helping maintain efficient fuel delivery and reduced emissions.
- Designed as a direct replacement for affected Sienna models, supporting consistent idle and smoother acceleration by stabilizing the air-fuel mixture.
- Ideal for DIY replacements or professional installation when replacing downstream sensors in 2004–2010 Toyota Sienna vehicles.
Product specifications
- Brand Name: IWOKPHD
- Choice: Yes
- Electronic: No
- Hysteresis: 2004–2010
- Measuring Range: part
- OEM No. (Part Numbers): 89465-08030, 89465-08070, 234-4516
- Origin: Mainland China
- Repeatability: For 2004-2010 TOYOTA SIENNAS
- Sensor Type: Piezoelectric
- Type: Heating Type
Package includes:
- 1 x Oxygen Sensor Downstream for Toyota Sienna 2004-2010
Warnings / Reminders
- Please check the part number before purchasing replacements.
- Please make sure that you are ordering the correct auto part for your vehicle.
- If you’re not sure or don’t know, please contact us with your VIN, YEAR, MAKE, and MODEL to verify fitment.
- Review vehicle-specific fitment notes for downstream positions as listed: 2004–2006 3.3L V6 (Downstream Rear, FWD) and 2007–2010 3.5L V6 (Downstream Right, FWD).
- If you experience issues with the part, provide problem details or photos to our Customer Service team for prompt assistance.