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      02-08-2013, 04:08 PM   #1063
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Drives: 2010 X5 M
Join Date: Mar 2009
Location: Calgary, AB

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Originally Posted by E92LNGCGY View Post
Hey Miguex. Any power upgrade for X3 with N55?
Still in beta testing.... checksum is the issue.... we are working hard. The ECU on N55 has tricore chip that prevents the antituning. BMW does not want 3rd parties tune these ecu becasue of the business/marketing. As you see in the case of N54... plenty of mods released.
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