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The HPFP used in the N20 is the same ones used on the N63. Driven by the camshaft. From what I've heard there havent had much failures with those pumps, but of course it is a BMW so anything can fail at any time.
The injectors are the same ones on the N55, so far those injectors have been pretty good. No longer the piezo electric ones on the N54.
As long as you have warranty there really is no worries. Worry when warranty is over.
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