When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
If you are just replacing the steering wheel, no, it shouldn't affect your DSC.
I don't know of a way to get rid of the airbag light.
Although ultimately it is your choice, I wouldn't recommend an aftermarket steering wheel on a street driven car since you'd lose the airbag which protects, among other things, your neck on a collision.