【Part Number】Upstream Oxygen Sensor: 234-9091, 2349091, 36531-R40-A01; Downstream Oxygen Sensor: 234-4462, 2344462, 36532-R40-A01. Please Confirm Your Vehicle Model And Part Number Before Purchase
【Necessity】Oxygen Sensors are An Important Component of The Fuel And Emissions Systems, It Can be Devided into Upstream and Downstream Sensor, They Monitor The Amount of Oxygen in The Exhaust and Transmit That Information to The Engine Computer so that Keep Higher Efficient Fuel Economy, Lower Emissions, etc