Thread: M Performance ECU tuning for X5/6M
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      03-12-2015, 04:53 PM   #5
smcdrmtt
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Drives: BMW X5 35dTesla Model S P85
Join Date: Mar 2015
Location: Boston, MA

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Possibly related to MPG ratings? Not that it should matter to an M purchase but it does seem to matter in practice.
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