Originally Posted by RonD
Your '03 will only have 1 Temp sensor on the housing, they dropped the 2nd sensor in '01/'02
I meant to correct you in an earlier post, this information isn't quite right. I had an 06 Ranger that still had two. My 07 only has one as well as the 05 Explorer SOHC that I have.
You don't have to remove the intake, but loosening it so you can lift it a little helps a lot! & removing it entirely isn't difficult.
It's very difficult to remove the thermostat housing without breaking the locating tabs on the bottom without the extra room. If they break, they end up in the coolant system & if you don't fish them out, could be an issue.