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Hmm...not too expensive for a fuel injector.
I work with heavy diesel trucks and one troublesome fuel injector usually means other ones are bad too. Ours clog up rather than leak, so thats probably why they all fail after a while. We mostly have this problems on Scania engines, so it is a thing of engineering indeed.
It's sad however that you had this failure on such a new car. My F15 is only six months old and Im already replacing Engine parts. During this time, I learned that taking out too much Power or reducing it's fuel consumption, usually comes at a cost of reliability. So while BMW prides itself with having super-efficent strong engines, here we are repairing them when they are almost new, regardless of diesels or gasoline ones, for things that hold up the whole lifetime of other cars.
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