My 03 S type v6 3.0 ..what is the correct name for the 3 way abs connector (like a y pipe )with a coolant sensor in it it sit above what I believe to be a aluminum thermostat housing . The part in ? has a small hose that runs to the overflow/expansion tank . This might not be enough info but I told the dealer the same and they are telling me its the thermo house am I wrong or they are .. I am in Arlington Tx. i have a 30 minute drive to go to the dealer i am going this week and taking pics ...but if I can get it ordered over the phone that would be better...Thanks...

 

Take a look here and see if it looks familiar
https://www.jaguarforums.com/forum/s...nt-leak-57344/