I just remembered, I had to get the Vanos Non-Return valve (2) from my local BMW dealer. I couldn't find them online. I think this is critical to keep oil in the Vanos unit, and prevent the startup noise most engines get with age.

Part # 11121706921

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2001 X5 4.4i Sport
2013 550i Xdrive M Sport
2000 528i E39 (Sold)
Unleashed Air Racing 279 mph Best Average Speed