Thanks for the link, David. Informative thread. Quick synopsis of the CCV issue:

http://www.xoutpost.com/bmw-sav-foru...tml#post793790

Besides the ECS kit, are there upgrades that would be preventative?

If I have to replace the valve cover gasket set again....

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2002 X5 4.6is in Estoril Blue
1981 320 with aftermarket turbo.
1974 2002