Replaced when replacing the transmission The Dorman – OE Solutions Automatic Transmission Oil Cooler is an essential component designed specifically for Ford and Mercury vehicles. This high-quality oil cooler helps prevent transmission overheating, a common issue that can lead to costly repairs This automatic transmission oil cooler is designed to match the function of an original cooler on specified vehicles. 2005-2007 Mercury Mariner Automatic Transmission Oil Cooler - Autopart Premium APOC151PG - Front Ford Escape Transmission Cooler 2008 Dodge Ram Automatic Transmission Oil Cooler - Dorman 918-454 Dorman 918-203 Transmission Oil Cooler Bypass Valve [Ford Escape: 2001, 2002, 2003, 2004, 2005, 2006, 2007] - [Mercury Mariner: 2005, 2006, 2007] Dorman 918-203 Transmission Oil Cooler For 01-07 Ford Mercury Escape Mariner ; Material: Aluminum ; Outlet Attachment Type: Hose Barb ; Outlet Diameter: 0.38 Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. It is engineered to help maintain proper engine oil temperature when an original cooler has failed from heat, corrosion, or damage.