The higherbro 4PCS Oxygen O2 Sensor is designed for a variety of Ford models, including the Mustang, Expedition, Explorer, Taurus, Thunderbird, F-150, and E-150. This sensor is compatible with 3.8L, 3.9L, 4.0L, 4.2L, 4.6L, and 5.4L engines, and fits models from 1999 to 2010. The sensor is made of high-quality materials such as stainless steel, copper, and aluminum, ensuring durability and longevity. It is a flange mount sensor, and comes in a set of 4, including both upstream and downstream sensors. This product is covered by a one-year quality guarantee, providing you with peace of mind. Before purchasing, please check the 'Select Your Vehicle' feature at the top of the page to ensure compatibility with your specific vehicle.