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[SOLVED] Sienna Bank 1 Sensor 1 Air-Fuel Oxygen (O2) Sensor replacement
This is the simplest approach to getting to that top O2 sensor on the back cylinder bank in Toyota Sienna with 3.5L transversely mounted V6. This video shows how to access the Heated Oxygen Sensor (A/F) against the firewall. Bank 1 Sensor 1 AirFuel O2 Sensor Replacement. [SOLVED]
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