Toyota reports that the curtain shield airbag inflators in the roof rails are comprised of two chambers that are welded together. For an unknown reason, some inflators may have formed a crack in the welding area joining the chambers, which over time could grow and eventually separate the inflator chambers.
As a result, one or both sections of the inflator could enter the interior of the vehicle, which poses an injury risk if an occupant is in the vehicle.
A spokesperson from Toyota has confirmed with CarAdvice that for the inflator chamber to enter the cabin, the airbag would need to be partially deployed - therefore the vehicle would need to be involved in a collision for the fault to occur.
Owners of the affected vehicles will be contacted via mail.