Aahh nice one Mirez, Funny you should mention it, I do now have a squeeling/ hissing noise especially when engine is under load, and accelerating It has only started recently and it does sound a bit like air leakage, but I suppose it could well be the Aux belt?? No other symptoms you mentioned though.I'm getting it checked out next week, and I'm glad you pointed out which belt it is Lol :P Cheers again.