DENSO Oxygen Sensors are manufactured and tested to the strictest OE standards for unparalleled peformance. Position : Oxygen Sensor. 1XDENSO234-9112 Oxygen Sensor. 🚗 2011 Lexus RX350 Base Sport Utility 4-Door 3.5L 3456CC V6 GASRWD-(Rear-Wheel Drive) Automatic trans Except California Emissions.