Yes, you can make it show the right speed by coding. BMW designed it, by default, to show higher speed. That could be just on the digital display (that you activate by coding).

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2008 X5 4.8i | Wheels: Summer> style 336 20" RFT; Winter> style 214 Ferric Grey 20" RFT | Aero kit | ESS E-Flash tune | V1 | LCI Rear Tail Lights | Coding completed | Engine replaced at 90K