Hi guys,
My GS was UK delivered and has the airbag switch for the passenger seat, which is illegal in Australia. The compliance guys employed by the previous owner ( private importer ) didn't disable the switch.
I had the same 2 warning lights come up and had them reset twice before an auto electrician associated with my indi got to the fault.
I was also advised on this forum the switch which is common to Alfa's is prone to die.
Hope this helps.