The product is a brand new OEM O2 exhaust sensor for a 1998-2011 Lincoln Navigator Blackwood. It is a Motorcraft sensor with manufacturer part numbers F85Z9G444BA, F85Z 9G444 BA, and F85Z-9G444-BA. This sensor plays a crucial role in monitoring the oxygen levels in the exhaust system to ensure optimal fuel efficiency and emissions control in the vehicle. Perfect for replacing a faulty or worn-out sensor, this genuine Motorcraft part promises quality and compatibility with the specified Lincoln models. THIS PACKAGE CANNOT BE RETURNED IF OPENED!