Denso Upstream Denso Air/Fuel Ratio Sensor for 2002-2004 ACURA RSX. Brand New · DENSO. (58 It is manufactured with precision to meet OE standards. Designed to detect the amount of oxygen in the exhaust system It is constructed from high quality stainless steel, porous polytetrafluoroethylene, fluorine rubber, aluminum oxide, high-grade platinum and ceramics. 234-4354 Air Fuel Ratio Sensor Replacement Denso Oxygen Sensor - 234-4354 High Quality Stainless Steel O2 Sensor This part generally fits Acura vehicles and includes models such as RSX with the trims of Base Coupe 2-Door,Type-S Coupe 2-Door Constructed from high quality material Denso Oxygen Sensor is designed to detect the amount of oxygen in the exhaust stream. Oxygen Sensors for 2005 Acura RSX for sale Manufactured with precision to meet OE standards , Easy installation