Before attempting this hack, at the very least you should identify that the seat sensor is at fault. There are dozens of components in the airbag system that can cause that light on the dash to go on. Get the car scanned with a GT1 or Autologic....then decide what you're going to fix. These scanners can point to the exact area of fault.

For all you know, you could have one of those Chicom counterfeit airbags we just heard about on the news that's causing a fault.

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2014 BMW 328i Xdrive
2011 BMW 335i M-Sport
2008 BMW X5 4.8i Sport
2000 BMW 528i 5sp