OK, thanks folks. I'm going to poke around for loose or cracked hoses, etc. Then if no luck, look for someone to test it. Yes, I was hoping to just hear that 3 or 4 folks on here had experienced a certain hose or something that was prone to falling off or deteriorating, which would make it a simple fix. Would hate to buy a $200 pump just hoping that will fix it and it doesn't. Also hate to spend $100 or $200 having someone test and then find out it's just a loose vacuum hose sitting in plain sight.

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2009 X5 3.0
2001 X5 4.4 - Sold