None of the service info I have really talks about the airbag system, other than to be careful. A number of toyota forums have people with various airbag codes including the B1650 that were resolved by doing a passenger seat calibration, which requires some kind of test tool, perhaps something you could get a loaner from one of the auto parts chains that loan tools. Some of the youtube videos also had seemingly unrelated airbag codes that resolved with the calibration
I don't know about the VIN specific. All the other gm cars from the era had radios that were VIN aware, but the Vibes didn't have the required GM databus so if you replace the radio with another OEM unit, you need to get one from a Vibe but you don't need to deal with the GM theftlock radio stuff. Perhaps its the same for airbag components.
Did you have the airbag recall done on yours?