You could try this:

Amazon.com: Loftek B800 Bmw Srs Airbag Scan & Reset Tool Scanner Resetter: Automotive

It's fulfilled by Amazon so if it don't work you can get your money back. There's another seller on Amazon but it is not fulfilled by Amazon so I don't know the return policy. Some people had good luck with it, and some people didn't. I suspect that people that didn't have good luck with it don't know how to use the reset tool. I have used carsoft 6.5 in the past to reset SRS light on my older BMW.