I just changed out the cabin air filter on our 2017. I can't image the 2018 being any different. Advanved Auto ( Carquest Premium #527993. $8.99) Poor design as the filter must be "bent" in a way in order to fit into compartment. (The filter is not rigid as others I have used in other cars.) Fram makes a "Fresh Breeze"CF11854 which costs about $23.