NGK leads were purchased long before your warning. It wasn't early enough to save me, but maybe there are others here who will heed it and spend the ridiculous extra amounts for properly blessed BMW leads.
Doesn't really matter anyway, Martin, I am damned because my bricks have a number of non-BMW replacement parts. For instance, I use Carquest oil filters and Volar brake pads, not to mention $20 fuel pumps. Martin, my friend, I am doomed to the deepest reaches of hell where no one will ever find me.