So according to your theory BMW has a shit of a manufacturing line that it can't control tolerances well so much so that a whole line of vehicles (the 20i) is spawned.
Since u say the failure rate is so high then what happens to the turbocharged 4.4 in M cars and the 35i engines? BMW has to make 2 or 3 engines and throw away 1-2 engines just to make a car because their detect rate is soooo high?
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