follow the top radiator hose down to the engine the thermostat is located in under that housing where the hose is connected to,drain some of the coolant out of it though before you try to do this other wise you,ll loose quit a but of it,there's a drain on the bottom of the radiator that will allow you to do this,once you have the thermostat in and all tightened back up be sure and re-fill the cooling system on it,and run it check for leaks and your done,fairly easy job if you take your time and don't get in a hurry,good luck with it.How do you locate and change out a thermostat in a 2001 ford focus se?dodge man is wrong.......go here
www.focusfanatic.com
