0.24 Cd is on par with the all-electric Tesla Model S. The Optima PHEV has an active grille, which automatically opens and closes at high and low speeds, contributing to reduce the Cd. The plug-in hybrid features a 50 kW electric motor and 2.0-liter “Nu” four-cylinder GDI engine, mated to a six-speed automatic transmission. Retail deliveries began in the United States in January 2017 with 40 units sold. Facelift (2018) The facelifted Kia Optima was officially revealed at the 2018 Geneva Motor Show. In January, the facelifted Kia K5 was introduced in South Korean market. Safety The 2017 Optima received a "Top Safety Pick+" rating from the Insurance Institute for Highway Safety (IIHS). Awards The Optima is a two-time winner of the International Car of the Year award. it also won the 2016 Red Dot "Best of the Best" Award. Kia Optima Convertible Concept The Kia Optima Convertible Concept was shown in 2015; a 4-door concept car similar to the Kia Optima sedan without a roof and rear-hinged doors for the rear passengers in place of the front-hinged doors of the production car. Fifth generation (DL3; 2019) The fifth generation Optima is badged as the K5 worldwide. It was first unveiled in November 2019 and released in South Korea on 12 December 2019. Its overall design is similar to that of the Sonata, with a fastback-like profile, a trend that began in the 1940s. However, the styling is unique, featuring Z-shaped running lights, a textured grille and a chrome strip that runs along the window line and becomes more prominent at the C-pillar. The interior has been redesigned significantly as well, with an optional 12.3-inch digital cluster and 10.3-inch center screen, augmented by Apple CarPlay and Android Auto and an optional 12-speaker Bose audio system. Under the hood, engines mostly mirror that of the Sonata, with the base 4-cylinder turbo 1.6-liter engine producing 180 hp and 195 lb⋅ft of torque and the GT receiving a high-performance 2.5-liter turbocharged four-cylinder unit with 286 hp and 311 lb⋅ft of torque. All-wheel drive is newly available on some trim levels, distinguishing it from the Sonata. Depending on the market, Advanced Driver Assistance Systems (ADAS) include Forward Collision-avoidance Assist (FCA), Blind-spot View Monitor (BVM) with Surround View Monitor (SVM) and Blind-spot Collision-avoid Assist (BCA), Smart Cruise Control (SCC) or Navigation-based SCC (NSCC), Lane Following Assist (LFA), Driver Attention Warning (DAW), and Highway Driving Assist