Thanks. I'll probably be buying this kit on eBay:
https://www.ebay.com/itm/BMW-DOUBLE-...E/152579724708

Basically has the 10 o-rings and two superfat washers/spacers for $55. I know it's probably about $5 in true parts cost, but they put the kit together. I expect it will be good quality, vs. some of the cheaper VANOS kits on eBay.

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2001 X5 3.0i, 203k miles, AT, owned since 2014