UK Car Repair Questions? Ask a Mechanic for Answers ASAP
The mileage can not be changed with a normal Porsche tester but the VIN can be changed in the cluster to match your VIN. There is hope though. There are companies that perform mileage correction and they can do this just by sending them your replacement instrument cluster. I realize you are in the UK but I do know of a very good company that performs this in the Los Angeles area. The name of the company is DAL Diagnostic Auto Lab.
Do you have any questions about this?