The Bosch Oxygen Sensor - 16139 is a high-quality automotive sensor designed to measure the oxygen levels in a vehicle's exhaust gas. It is a crucial component in the engine's emission control system, providing accurate readings to help regulate the air-fuel ratio for optimal performance and fuel efficiency. This sensor is made with durable materials and advanced technology to ensure reliable and long-lasting performance. It is compatible with a wide range of vehicle makes and models, making it a versatile choice for mechanics and car enthusiasts. The Bosch Oxygen Sensor - 16139 is a trusted and essential part for maintaining the health and efficiency of a vehicle's engine.