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@Spitula, Dinan IS an option but it comes at a cost ... approx $1950. But, Dinan will cover any warranty work should BMW deny any repair work cuz of their "tune," generally speaking. Dinan and RCU are piggyback system. There's plenty of threads here about their similarities/differences. I suggest you read up and decide for yourself. RCU is a cheaper option but no warranty. JB4 is also another tune out there. MPPK is another option or an ECU flash. At least half a dozen options out there. It boils down to what is important to you.
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