ECU TUNING - What's the most preferred ECU Tune for N54 engines?
I've been searching for a while for the simplest way to re-flash the ECU without any other modifications. JB4 is the most recommended, yet i heard there are some other options (such as Evotech, Hamann, Active Autowerke, ESS)
Any recommendations? *Note bmw x6 35i 2010
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