Motorad 92ZX34M Thermostat Fits 2002-2010 Mercury Mountaineer 4.6L V8

Notes: Fail-Safe -- The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating.; 195 Degrees F; OE Specified Temperature.