Type:Thermostat Housing. for Ford for Mustang 4.0L V6 A/T Base Convertible 2005-2010. for Ford for Mustang 4.0L V6 A/T Base Coupe 2005-2010. The single-sensor thermostat repairs the common coolant leakage problem at the seam of the shell, makes the engine work in a suitable temperature range, and reduces engine wear and tear.