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      04-17-2012, 06:55 PM   #71
sales@ESSTuning
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Drives: ESS M3 / M4
Join Date: May 2007
Location: AZ

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Quote:
Originally Posted by kitw View Post
Huh, interesting. Doesn't this mean that your other modules will be out of sync, if you are just updating the main DME software?
231E is backwards compatable with older module software. If you want to update older module software at the dealer you can but it is not required to update the ECU to 231E.