OBD2 port is where you attach the computer under the dash to read Check Engine Light (CEL) codes if there is a problem (also where you would connect the scan guage to if you wanted one).
chances are that a replacement wheel would fix your problem but no guarantees. If you can source one as cheap as vxorado did, it'd be inexpensive enough that it's worth a shot (helluva lot cheaper than re-working your airbag).