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      12-06-2015, 01:07 AM   #74
adidoman
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Drives: '10 335i xDrive
Join Date: May 2014
Location: Denver, CO

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The build-up on the intake valves have to causing a problem for it to be done with warranty work, back on my n55 they said one of my persisting problems was do to carbon build-up and they cleaned the intakes covered under warranty. Otherwise it's going to be considered maintenance and it's going to cost you.
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