Invisible yet effective.

The safety bodyshell in the BMW 3 Series Sedan.

The doors of the BMW 3 Series Sedan close with an understated but reassuring sound. The high-strength crossbars that are hidden inside the doors are less noticeable, but even more reassuring. Throughout the 3 Series' body, in fact, strategically-placed reinforcements and crumple zones provide a maximum of occupant protection in an impact situation.