Got it, thanks for your help but its different to the one on my car ? Its alot bigger 
....Ooops! Did you not compare also the part # I gave you with yours? Though probably difficult to access. Alternatively your VW dealer Parts Manager would be able to tell you the part # if you told him your chassis #.
That's strange because we both have K03 version Mk5 GTI's and mine was built in July 2005 to a Volkswagen 06 spec. They used to change the factory spec slightly in June/July every year.
If it's no use to you I'll return your £30 and ask you to return the hose. Please let me know what you want to do.
