ok well after having it for 6 month i finally found out what this noise was... had my car serviced today and when i went to pick it up he told me the knocking sound is from my front wheel and not an engine mount and that bridgestone checked and serviced my wheels 4 weeks ago.

my mechanic noticed it while he took it for a drive so he was gonna check the bearings etc etc and he went to take it off when he noticed the whole f*cking wheel was loose.

So guess what f*ck bridgestone never going back, they've lost me