Oem Replacement Sensor Denso 234-4157 Oxygen Sensor Air And Fuel Ratio Djibouti Car Exhaust Oxygen Sensor This oxygen sensor can be installed easily and ensures longevity., Efficient Fuel Consumption , Easy installation Denso 234-4157 Oxygen Sensor (Air and Fuel Ratio Sensor). 4.0. Brand Rating. wishlist Constructed from high quality material The Denso Oxygen Sensor measures the amount of oxygen in the exhaust gases. It sends this information to the vehicle's ECU, which adjusts the air-fuel mixture for optimal combustion, improving efficiency and reducing emissions Denso Oxygen Sensor is designed to detect the amount of oxygen in the exhaust stream. Oxygen Sensor Denso 234-4157 - BOLD Auto Parts - Bold Auto Parts Manufactured with precision to meet OE standards