Centre airbags are designed to minimise the impact between the two front seat occupants in side-impact and rollover crashes. These airbags are deployed from the side of the driver’s and/or front passenger seat. The result is that they reduce the likelihood of the driver and front seat passenger sustaining serious neck, head and spine injuries.

Do you know if your car has a centre airbag?
 
Photo & video sources: Autoliv, Ford & Car and Performance TV