APDTY 013971 Complete Upper & Lower Thermostat Water Outlet Housing Kit Fits V6 4.0L Engine ONLY 2002-2010 Ford Explorer & Mercury Mountaineer (Replaces 2L2Z8592BA, 2L2Z8592BB, 6L2Z8592FA) Repairs The Common Coolant Leak On The Seam Of The Housing on 4.0L Engines New Thermostat & All Seals Included Complete Upper & Lower Housing Pre-Assembled For Easy Installation Can Be Used On Models With 1 Or 2 Coolant Temp Sensors Pre-Assembled For Easy Installation