The Radiator Coolant Tank is a simple but critical component. It manages the dynamic volume of coolant, purges air, and helps maintain system pressure. Regularly checking its level and condition is one of the easiest and most important forms of preventive maintenance to avoid costly engine overheating damage. Fitment: Ford Escape 3.0L 2001-2012 Ford Escape 2.5L 2009-2012 Mazda Tribute 3.0L 2001-2006&2008-2011 Mazda Tribute 2.5L 2009-2011 Mercury Mariner 2.5L 2009-2011 Mercury Mariner 3.0L 2005-2011 Ford Escape 2.3L 2005-2008 Mazda Tribute 2.3L 2008 Mercury Mariner 2.3L 2005-2008 Ford Escape 2.0L 2001-2004 Mazda Tribute 2.0L 2001-2004 Common Problems: .