My 2001 X5 3.0 has never had the Vanos seals replaced -- it has 197,000 miles. I am reading on other boards that the M54 motor will gradually lose power and MPG and that these seals will last a max of 100,000 miles.
I found DRVANOS
https://drvanos.com/collections/dual online and it looks pretty good -- they do a switch-out with the existing Vanos.
Has anyone used them and can report back their experience?
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Mark
2001 3.0 Original Owner, still going
2012 E70 xDrive 35i Pre-Owned -- sold because no one could figure out the transmission problem