The BMW i4 is an all-electric four-door fastback styled sedan under development by German automobile manufacturer BMW, marketed as a four-door coupe. It is the fifth model of the electric BMW i sub-brand and is described as "a G20 3 Series with battery-electric drive and a heavily modified body". A production version of the Vision Dynamics, worldwide market launch is expected for 2021. The BMW i4 is based on the Vision Dynamics concept that debuted at the 2017 Frankfurt Motor Show, which was built on the flexible CLAR platform rather than a carbon-fibre structure as with the contemporary i3 and i8 electric models. The production version was announced at the 2018 Geneva Motor Show as the BMW i4. It will be first unveiled as a concept car destined for production at the 2020 Geneva Motor Show and then in production form late 2020. At the 2018 Paris Motor Show, BMW confirmed the i4 would utilize lightweight construction to make the model attractive in an electric market weighed down by bulky batteries that reduce on-road handling. The plant was closed for six weeks to convert more than 1000 robots in the body shop and assembly area. The i4's electric motor is assembled in Dingolfing. The production model is based on the modular CLAR platform to keep costs low and volume-production attainable. The connected grille design of the concept was abandoned after receiving feedback that it "wasn't considered a BMW kidney grille anymore." It is expected to be closely related to the G22 4 Series Gran Coupe, but may sit higher to allow space for batteries above the axles. The electric drive component of the BMW i4, its charging unit and high-voltage battery are all developed in-house by the BMW Group. A notable technical feature of the i4's powertrain concerns its packaging. The electric motor, transmission and power electronics are all contained in a single component, which allows for a higher efficiency of energy conversion. The design of the high-voltage battery used in the i4 is characterized by its extremely flat design and optimized energy density. The fifth-generation eDrive system supports up to 150 kW DC fast charging. The 80 kWh battery pack of the i4 can be charged to 80 percent in 35 minutes or six minutes for a range of 100 km (62 mi). The model planned to be introduced at launch is the high performance xDrive80 with a two-motor, all-wheel-drive layout. Additional power and range models will be available.