Model years for rentals usually feature the current year model and the previous years incarnation (depending on time of year, of course). Let's say for instance that you rent a Jeep at the Kahului airport (OGG) in mid-2019. You will most likely get to choose from 2018 and 2019 models. Often, the only difference is the mag wheel styles on the various Sahara Jeeps in the fleet lot (Sahara fenders match Jeep body color). So, if you want the newest Jeep make sure to study the wheel styles on the Jeep website before your trip to Maui.