How do you replace the airbag sensor module?

where is the airbag sending unit for when yoy hit somone in the front where is that module for the airbag in the front. "If you want to replace it, bad idea, that will be ALOT more costly. I had my original SRS module sent in for a reset. I just googled a company called www.myairbags.com and they reset mine for $55 and shipped it back to me free of charge, I hooked it up and it works like brand new! and I saved about $560.

*Disconnect battery if you are working with the Airbag Module, if its powered and it feels movement, It could trigger the Airbags to blow."