The Bosch Oxygen Sensor - 13721 is a high-quality sensor designed for measuring the oxygen levels in a vehicle's exhaust gas. This sensor is specifically designed for use in gasoline engines and is compatible with a wide range of vehicle makes and models. It is a direct replacement for the original equipment sensor and is built to meet or exceed OEM specifications. The Bosch Oxygen Sensor - 13721 features a durable construction and advanced sensor technology for accurate and reliable readings. It is an essential component for proper engine performance and emissions control.