Chrysler Repair: Coolant/Antifreeze pressure cap: 03 Sebring, radiator coolant, chrysler sebring

Question
Hi,
I have a 2003 Chrysler Sebring Sedan and the cap where I put my antifreeze has corroded.  What would the mechanical terminology be for this cap so that I can order online if possible.  Is this part of the radiator?  Coolant cap? Radiator Cap?

I know, typical woman!!

Answer
This cap is called the "coolant pressure container cap" and I assume you have the 2.7L engine. It is rated to maintain pressure up to 14 lbs/sq ft. (or whatever number is shown on the present cap that you have). Be aware that the system is different for the 2.0/2.4L engine which cap would have a different name and not be interchangeable with what I have described.