Airbag light won't go off

Take it to a shop where they can diagnose the various parts of the airbag system. It's connected by fiber optics, and each airbag and the central module can be checked separately, as far as I understand. My airbag light is also on, and in my case, multiple codes are coming back from the central module, so the shop suspects it is bad. My vehicle is a flood salvage. I went and removed the module, and it looks perfectly new, so I'm hesitant to drop $850-900 on a new one unless I'm sure it's bad. This may be a case where taking it to a BMW dealer will be necessary, in my case. In your case, I'd try any independent mechanic that can scan the airbag system.