[quote=”Moose” post=99434]The airbag light on the early Boxters is generally due to poor electrical connections at the seat belt receptacles. You’ll need to the code scanned by someone with a PST2 (factory scan tool), PIWIS (another factory scan tool) or a Durametric. There’s a repair kit available from Porsche that involves some splicing and soldering as well as replacing the offending receptacle. It’s not a difficult job, but again you need a factory scan tool or Durametric to reset the light.
However, combined with your radio code issue, it sounds like you need a new battery. Low voltage will set the airbag lights off on Boxsters as well, and if you’re not holding enough of a charge to keep your radio alive, you’re probably throwing a low voltage code to the airbag system as well.
Those are the two most common reasons I’ve encountered while working on Boxsters (and Caymans). Either way, you’re going to need to have the code scanned, but if you test your battery first, and find that it needs to be replaced, you might get lucky and will be able to take the car to an indy shop or dealer and have the light reset without any further work needed after replacing the battery.[/quote]
I was also going to suggest checking the battery. Low system voltage can cause all kinds of issues on modern vehicles. More info here.
http://www.ericthecarguy.com/faq/solving-automotive-electrical-problems
Good luck and keep us posted on your progress.