I tried to look it up but I couldn't find an answer I found that the 14-16 FiSTs take the old r134a refrigerant, but not sure if that's the same for the 2017 and up. The shiity google AI feature says it takes the new 123y or whatever refrigerant, but then when I click on the link thats getting its answer from its talking about a 1.5L fiesta from I think a different country.