Delphi BG5120C Rear Coated Brake Disc Pair. Delphi 249mm Rear Coated Brake Disc Pair. Autovaux was established in 2001 and is recognised as The Number 1 Supplier for Genuine Vauxhall spares and O.E Quality parts for all car manufacturers with Vauxhall trained staff and the most up to date parts software available.