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      02-02-2014, 06:46 AM   #2007
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United Kingdom

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

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It was just a thought...I seem to have read quite a few reports of owners having faulty coil packs eventually giving an engine code fault. It occurred that if the integrated coil/anti-knock unit was malfunctioning then the combustion loads in that one cylinder could be higher.
There is this thread:
where plugs apparently hadn't been changed for 47K miles - is that normal?
The owner also ended up having 2 faulty coils replaced.