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      10-05-2012, 06:52 AM   #27
Private First Class

Drives: '15 X5 35i/'11 335i M-Sports
Join Date: Jul 2010
Location: Atlanta

Posts: 148
iTrader: (1)

My n55 does something similar when I restart the car an hour or two after it's been driven. The idle will bounce between 500 and 1200 about six or seven times before it settles down into a normal idle of around 550. Have never had any codes and the dealer couldn't find anything wrong.