Side Impact Protection: An impact from the side present particular dangers, as there is a far smaller deformation zone available to absorb the impact forces. Automobiles are designed with a side impact protection system. This ranges from doors and robust B column to specialised head and side protection airbags (varies from manufacturers).
Diagonal aluminium cross-members are embedded within each door and ensures that the doors and side walls are exceptionally strong and stiff, preventing intrusion of external objects into the cabin.