The Bosch Oxygen Sensor - 17254 is a high-quality automotive part designed to measure the oxygen levels in a vehicle's exhaust gas. It is used to monitor the fuel-to-air ratio and ensure that the engine is running at optimal efficiency. This sensor is compatible with a wide range of vehicle makes and models, and is designed for easy installation and reliable performance. It is made with durable materials and advanced technology to provide accurate readings and help improve overall vehicle performance.