O2 Oxygen Sensor 4piece O2 Oxygen Sensor For Hyundai For Tucson 2005-2009 For Santa Fe 2003-2006 For Kia For Sportage 2005-2010 Upstream Downstream Sensor

4piece O2 Oxygen Sensor for Hyundai for Tucson 2005-2009 for Santa Fe 2003-2006 for Kia for Sportage 2005-2010 Upstream Downstream Sensor Rugged construction ensures long-lasting performance, making it a cost-effective automotive solution Improves fuel economy by increasing engine efficiency through accurate measurement of oxygen levels The function of the oxygen sensor is to monitor the mixture at all times to keep the engine in the best mixture combustion state Oxygen Sensor is designed to improve fuel economy while reducing harmful emissions. Helps the engine run efficiently in air-gas ratio. Improve engine response and performance.