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      12-07-2012, 09:29 PM   #40
Private First Class

Drives: 2008 328i Coupe
Join Date: Oct 2011
Location: Michigan

Posts: 173
iTrader: (1)

I know that idle instability could come from various different issues or a combination of issues but I recently got lucky and fixed the bouncy/rough idle on my '08 E92 328i with the N51 motor. If it helps anyone:

Good luck!