Not only since the Paris Climate Agreement, sustainability and energy consumption have been highly relevant factors in the automotive industry. The efficiency of a battery electric vehicle (BEV) not only defines – together with battery capacity - range, but also affects charging time and thus overall journey time at long distances. The chassis, too, can make a significant contribution through the optimization of rolling resistance, drivetrain friction, residual braking torques, aerodynamics, mass, and driver assistance systems. With the ID.7, Volkswagen demonstrates how consistent and consequent efficiency optimization in the chassis translates into competitively superior customer benefits in terms of consumption and range. This is made evident in aspects such as wheels, tires, driveshafts, wheel bearings, brake systems, springs and other axle parts as well as assistance systems. Efficiency optimization is always a trade-off between competing goals, e. g. rolling resistance vs. driving dynamics or mass vs. aerodynamics. By using cost equivalents, efficiency measures can be objectively compared and evaluated in order to find the respective optimum. Using this method, the Volkswagen ID.7 became a master piece of efficiency with consumption of up to 14.1 kWh / 100 km and range up to 700 km thanks to a high contribution of a consequently optimized chassis.