HELP- Instruments Cluster Problem

[WANGCH]

i have a problem with the instruments cluster, i bought a 2006 X5 3.0 from the US and ship to China, because of the low mileage of the car ( only 19,000 miles), the China customs will charge me very high tax as a new car!! so i asked somebody to increase the mileage to 48,000 miles, now there is problems with the cluster: the speedometer , MPG gauge and mileage did not run, but the fuel gauge, tacho, coolant temperature works well.

Would somebody told me how to solve this problem?

or i have to change a new instruments cluster? if i have to change a new one, can i change one with KM/H to replace the Mile/H, if i purchase a new one, would it happen again? how do i should process with the new cluster? because without speedometer, i can not pass the government's check.

thank you for all the suggestion.