Join Date: Dec 2005
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It sounds like a pulley bearing noise,but which one can be difficult to tell sometimes.Your noise is the most difficult to diagnose,as it doesn't do it all the time.
It could be the power steering pump,the alternator or the tensioner pulley(or aircon pump if you have one).
One thing to make sure about is that you have the right belt fitted.A slightly too long a belt would cause a simialr problem.Also,try spraying a little bit of WD40 (or similar) on the belt when it's sqeaking.If this makes it go quiet,then it's a belt problem rather than a bearing problem.
I'd rather push my Alfa than drive a BMW....
Currently in Lagdti's garage:
2004 Saab 9-5 HOT Aero and a 2001 Audi A3 1.8 Turbo