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      11-26-2011, 05:22 AM   #95
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United Kingdom

Drives: 2017 M4 CP DCT
Join Date: Mar 2009
Location: UK

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There is (or at least was for the UK market) a software update for the ECU, as part of a larger software package, that covered this issue about a year and a half ago (flat spot @ wide throttle opening at lowish revs)....which is why later cars don't suffer from the problem.
Most cars will already have had the update at some time but if you have an early car that hasn't had an update since spring 2010 then that will solve it (assuming the rest of your car is in good order).