The 2006-2011 BMW X5 has a highly rigid body structure for maxium occupant protection is made with Ultra High Strength Steel. The passive safety features in this vehicle are passed on via the engine supports and chassis along various load paths which diverts the energy away from the passenger cell.
The BMW X5 has front and hip/thorax airbags and standard with side curtain head airbags (pictured below). The seat belts have force limiters, belt tensioners and crash-active headrests at the front. There are roll-over sensors that active the curtain airbags and the belt tensioners in the event of an imminent roll-over.