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Originally Posted by Zzhou
THANK YOU~ One more question. I have AA tune right now, should I flash my ECU to stock then go to dealer to get upgrade, orI just go in with a TUNE and they can upgrade to 240E.
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If you want a 240e tune, that's fine but you will lose your AA tune if you do so. This likely means that you will have to buy another AA tune if you want it back. You would have to check with AA in regards to their policy on that though. It's always a good idea to flash to stock if you want the dealer to do any work for you, just as a precaution although we take tuned cars to the dealer all the time without issue.
In my honest opinion, I wouldn't worry about the 240 update since you already have a tune. You'll likely be wasting good money.