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Old 01-16-2012, 02:44 PM
brewder brewder is offline
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Location: Allentown PA Area
 
Join Date: May 2010
Posts: 685
Mein Auto: 2011 328i xDrive
Quote:
Originally Posted by Etubom View Post
Hesitation occured when under hard acceleration between 2800-3000 rpm. Would not throw a code for a long time, but finally did so 7 months ago. The problem was with one of the pre-catalytic converter O2 sensors. It was replaced, the problem disappeared and the X3 has been smooth as silk ever since.
I have this EXACT issue on my 2008 X3... weird trans hesitation/pulse but only under heavy acceleration. Can you give me any more detail on the O2 sensor replacement?? Like cost and part number(s)??

Thanks!!
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('11 E92 328i xDrive - Deep Sea Blue | '07 E92 328xi - Space Gray)
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