See also:

Locking and unlocking
Pressing the buttons locks and unlocks the doors and the tailgate when the front doors are closed, but they are not secured against theft. The fuel filler flap remains unlocked. ...

Front airbags
Front airbags help protect the driver and front passenger by responding to frontal impacts in which safety belts alone cannot provide adequate restraint. ...

High-strength body structure with extremely stiff passenger cell
The body of the new BMW 3-Series Sedan meets the highest standards across the board. Large and extremely durable supporting structures and the intelligent use of high and ultra-high-tensile multi- ...