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Over the past few months my E30 320i has begun to chirp a little. It started out minor but has grown a bit louder recently and is starting to concern me. Ive attatched a video for you guys to listen to https://www.youtube.com/watch?v=YO_bk3LXYvc It doesn't occur during startup and only begins after giving it a few revs, it usually takes until the end of my driveway to begin chirping at me. Its intermittent, kind of in sync with the IDLE, however if you give it just a little revs it disappears. To me, it sounds like it must be coming from the alternator. After driving for +/- 10 minutes as the engine properly warms up it fades away and all seems well. The power steering and alternator belts appear to be visually fine, they seem to be tensioned and have no visual cracks on them. One point of concern is that my power steering reservoir is seeping / slow leak down the hoses, which i'll be needing to replace in the near future, however I don't think its related to the noise occurring as no oil is getting on the belts as far as i can see / feel. Any help would be appreciated, Cheers.