An airbag assembly includes an attachment bracket, an inflatable airbag and a deployment device. The attachment bracket is attached to an outboard bolster section of a seat assembly. The attachment bracket defines an attachment section that extends along an inboard surface of the outboard bolster section and a deflection surface extending from the attachment section with the inflatable airbag. The deployment section is attached to an inboard side of the attachment section. The deflection surface is dimensioned and shaped such that upon deployment of the inflatable airbag the inflatable airbag is guided to move by the deflection surface in a forward deployment direction relative to the outboard bolster section.