1. The Aero 
Source: BMW

Aerodynamically, the BMW i4 has it all well-laid out. The front air dam channels air under the hood, and into the underbody, where the rear diffusers push it out at low pressure, creating a suction effect. This improves downforce and will be key at higher speeds. The flared wheel arches ensure that the wind vortices are kept in check. The aero wheels suck in air to cool the breaks, and to improve cornering drag.