im streetbeefs mate who found the info out originally the master tech said if you can put up with it then do if its really bad they have a temp fix but aparently it will start making the noise again he said 30k later ish. he did say it was defo the supercharger pulley and he was at a meeting with seat and the issue has been raised and they are working on a fix, expect it in a couple of months. In one of streetbeefs posts on this thread he said i was picking mine up the following monday it had 7k on it but i cudnt make it chirp so i handed it over to streetbeef and he couldnt make it do it dont know whether mine has been done before as it was an ex seat uk car but not sure.