Discussion
I’m new to this forum and was hoping someone could help me out with a question regarding a component under the bonnet of a BMW E46 328ci. I Have been looking at one of these for sale and when I opened the bonnet to check out the engine (which had just been started) this component was making a noise that sounded like an electric motor running at high speed and it was also making a vacuum popping sound. The sounds ceased after a couple of minutes but it didn’t sound normal. The item in question is about 3.5 inches in diameter and positioned on the right hand side between the windscreen washer bottle the suspension tower and the engine. I have looked at some 330’s as well and cannot see this component. Is this an item to look out for? Which is the better model in everyone’s opinion? 
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