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Side Airbags

Since the introduction of MRS, side airbags have been standard equipment. Rear airbags on some vehicles are part of an option package.

Side airbags are designed to prevent injury to the thorax (chest) region of the occupants.

Side Airbag with Inert Gas Inflation (Rear view) 

Fig 1: Identifying Side Airbag With Inert Gas Inflation System
G04750454Courtesy of BMW OF NORTH AMERICA, INC.