I am currently doing this in a 745 now. I remove the fuel line going over the valve cove. Press in the black clip and pull the hose off. You can press by hand or with anything you can find since it may be tight.

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'03 745Li, '04 Escalade, '93 Toyota Supra (9.0 seconds @ 156 mph). Whoa!
11 550i xdrive stage 2 tune