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      10-27-2010, 02:41 PM   #395
raceyBMW
king of the hills
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Drives: 335i coupe
Join Date: Dec 2006
Location: Denver, CO

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1994 530i  [4.25]
2007 335i Coupe  [4.07]
SES was not actuator related, at least not on N54. I have had mine unplugged for basically 3 straight years, and never have had an SES light come on.

N55 could be different, maybe they put a check in the ECU as an extra step to prevent people from doing the mod? Maybe the actuator in the N55 also controls other vac systems as well?