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      11-08-2012, 09:58 AM   #20
Brian425
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Drives: 2012 BMW X5 50i
Join Date: Jul 2011
Location: Brooklyn, NY

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I had the Dinan Stage2 flash done at Circle BMW in NJ. I am very happy with the tune. I considered a few tunes with ESS and Dinan being the 2 finalists. I chose Dinan ONLY because of the comfort of the BMW dealer also being the Dinan dealer. If there is a warranty issue, I can bring it back to Circle BMW and let them figure out how to deal with the warranty issue. I have a Circle BMW invoice selling me the Dinan tune.

That said, there is a $1000 plus convenience premium. That is not insignificant to many people.

I work in IT, I am sure that BMW stores parameters for all key systems. They can only store a limited set of data, so you may be able t return to the stock tune and drive the truck for a few days. I would still expect that they would store the max and min values for most data.
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