When a speedometer cluster fails, a replacement unit must be programmed to show the vehicle's true accumulated mileage.

If you still encounter sites offering "TachoSoft mileage calculator 231 crack 1 upd," these are red flags:

Rather than simply editing raw hex values, TachoSoft uses manufacturer-specific algorithms to correctly recalculate checksums and ensure the new mileage value is accepted by the vehicle's modules.