UK-POLOS.NET - THE VW Polo Forum

I have the airbag warning light showing on my VW Polo 2004. This came on after I replaced the Body Control Unit with a second hand one. The battery was left disconnected for a couple of days whilst I diagnosed a wiper fault and bought a replacement BCU. Any idea the likely cause of the warning and ways that I can clear it? Thanks.

Ways of clearing the fault is ie vcds of obdeleven.
But I would check first what the fault is.