EVEN BLOWS THE WIND AWAY. Practically immune to air resistance: as evidenced by the sophisticated aerodynamics in the BMW X5. The car’s designers came up with innovative features that greatly improve the air fow. For example, wind turbulence at the front wheel arches is greatly r educed thanks to the Air Curtain on the front apron and the Air Breather at the front wheel arches. Aerodynamically enhanced exterior mirrors and t he aeroblade on the rear play a role in delivering one of the lowest C d values in its class.