Photo 1 of QIJIAUTO O2 Oxygen Sensor Upstream & Downstream 2PCS - Fits for Toyota 4Runner 1999-2000 & Tacoma 2000 2.7L 3.4L V6, Replaces 234-9003 234-9001, SG1839 - Fix Check Engine Light, Improve Fuel Mileage

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Photo 1 of QIJIAUTO O2 Oxygen Sensor Upstream & Downstream 2PCS - Fits for Toyota 4Runner 1999-2000 & Tacoma 2000 2.7L 3.4L V6, Replaces 234-9003 234-9001, SG1839 - Fix Check Engine Light, Improve Fuel MileagePhoto 2 of QIJIAUTO O2 Oxygen Sensor Upstream & Downstream 2PCS - Fits for Toyota 4Runner 1999-2000 & Tacoma 2000 2.7L 3.4L V6, Replaces 234-9003 234-9001, SG1839 - Fix Check Engine Light, Improve Fuel Mileage