EXTERNAL SIDE AIRBAG

A vehicle includes a body having two pillars spaced from each other. The body includes a rocker extending from one pillar to the other pillar. An airbag is fixed to the rocker and inflatable to an inflated position. The airbag extends outboard of the rocker in the inflated position. The airbag includes a first chamber and a second chamber substantially fluidly separated from each other. The first chamber extends farther outboard of the rocker in the inflated position than the second chamber.