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Originally Posted by justinnum1
not sure but i cant imagine it would go well. probably void your warranty
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Warranty most likely is voided for things on the car that might be related to the power gain, and I was told by a dealer that they wouldn't be able to sell the car as a CPO vehicle after it's returned at the end of the lease. That has to cost them some money. Not sure how they recover that. If your center console gets stuck and you have a tune, or a headlight goes out, obviously they'll cover that.
I personally would wait for a handheld OBII style plug in device that will let you easily remove/install the tune. At least that's my plan. I had a dinan tune on my N54 but it was a nightmare because I had to keep getting the car reflashed every time BMW came out with a CPU update which seemed to be at least 2 times a year.
I know ESS made one for the E9x N55 models that was about $1000 and made about 40rwhp/60rwtq over stock....or about 45-50hp/70-75tq at the crank over stock.