Adding New Airbag Module to E90
My friend's car has been involved in accident three times. I have heard that after three accidents, you change airbag module, or send your current one to some people who can reset it.
This friend has bought a new airbag module and now asking me, if I can code this new module to his car.
Can anybody point me in right direction? What would I require?
Any step by step instructions?