Hi
Just realised that I've made the assumption that when you talked about fitting a sport wheel, that it was a BMW sports wheel with an airbag. If its a Momo or similar sports wheel without an airbag, then the airbag light will come up as the controller is looking for an airbag in the steering wheel.
There is a way to code out the airbag in the controller or to fit an airbag emulator, but I don't know what they are. Others will need to help here.