The Denso Oxygen Sensor 234-4489 is a high-quality automotive replacement part designed to ensure accurate measurement of oxygen levels in the exhaust system. This single sensor, manufactured by Denso, a trusted brand in the industry, is specifically designed to provide reliable performance and durability. With the manufacturer part number 234-4489, this oxygen sensor is a perfect fit for those looking to maintain the efficiency and functionality of their vehicle's exhaust system.