2009 Mazda 6 2.5L 4 Cyl. 2010 Mazda 6 2.5L 4 Cyl. Notes: Molded -- Y at Radiator to Hose Connector and to Expansion Tank lower connector. Position: Lower. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.