What scares me about this is that the airbag you're sourcing could be unreliable. It looks like this one is OE from Korea but you never know.
This is what scares me too. Not only that, but there are liability issues. Even if the part is good, if you're in an accident and the airbag doesn't go off properly and you're injured, as soon as they see a DIY project the liability falls on you.
Airbag cost me $320, labour was $60.
Most guys on the forum are from the US so I posted in USD
CAD all in was around $535.