All Scion models may include side airbags as optional equipment. Scion does NOT recommend replacement of original seat covers with non-Scion leather or other seat cover materials on vehicles due to the following: Seat covers NOT recommended by Scion may affect side airbag performance, in general or in part, during an accident. Modifications that negatively affect side airbag performance can result in severe occupant injuries. Seat covers are an integral part of this safety system. Replacing fabric seat covers with non-Scion leather or other seat cover materials may compromise the effectiveness of this safety system. The design of the seat is complex, integrating safety and strength with comfort and luxury.