The fourth-generation Lincoln Navigator (body code U554) was unveiled in 2017 for the 2018 model year, built on the lightweight Ford T3 platform. Utilizing military-grade aluminum-alloy body panels over a high-strength steel frame, it shed approximately 200 pounds while vastly improving structural rigidity. Both standard and extended Navigator L body styles were offered. The powertrain featured a high-output 3.5-liter twin-turbo EcoBoost V6 producing 450 horsepower and 510 lb-ft of torque, paired seamlessly with a 10-speed 10R80 automatic transmission and an advanced four-wheel-drive system. The interior set new luxury standards with 30-way adjustable Perfect Position front seats, genuine wood finishes, and a Revel Ultima audio system. A significant mid-cycle update for the 2022 model year introduced Lincoln ActiveGlide hands-free highway driving capability, Road Preview predictive suspension, and a 13.2-inch center touchscreen running SYNC 4. The vehicle enjoyed strong global popularity across North America, the Middle East, and mainland China.