NX: The segment-leading NX is freshened for 2018 with updated styling, interior touches, a new infotainment system and safety features. The NX 200t gets a name change to NX 300. With its RAV4 sibling moving to the new TNGA architecture as part of a redesign next year, the NX will likely make its move to the GA-L counterpart in time to debut as a 2020 or a 2021 model.
RX: With a full redesign for the 2016 model year, Lexus' top seller carries over for 2018 with updates to its Enform infotainment and more available amenities on the base model and the hybrid. Looking at a typical six-year cycle, the next generation could show up in 2021 unless it jumps to GA-L sooner. The RX looks like a good candidate for full "F" treatment, which would send a powerful message to sporty segment rivals such as the BMW X5 and Audi Q5.
Look for a promised three-row RX — badly wanted by dealers — to appear at an auto show by the end of the year and on sale in 2018.
GX: Based on the 4Runner, Lexus' midsize body-on-frame SUV is getting long in the tooth, with its last refresh in 2014. It continues, however, to ride the trend toward light trucks. Perhaps only a shift in that trend will push Toyota/Lexus to update the model beyond updating some seat materials for 2018. Assuming a decadelong cycle for the chassis, look for a new GX in 2020 for the 2021 model year. Maybe.
LX: Lexus actually outsells the Toyota version of this body-on-frame Goliath, the Land Cruiser, in the large premium SUV category. Both were freshened for 2016, with the Lexus getting the big spindle grille. For the 2018 model year, the Lexus carries over with some Enform infotainment updates. A redesign could come with other body-on-frame platforms, such as the Toyota Tundra pickup. The Tundra is due for a new generation in 2019 or 2020.