What engine is it?
On my 2.5 it is under one of the resonator boxes on the air intake pipe that goes from the airbox to the plenumn? at the back of the engine
Either engine trace the large coolant pipe at the top of the radiator back to the engine, and it is there, on a V6 it is built into the housing, and can be expensive from motor factors, try shop 4 parts.
Oh and hello and welcome
