They can update the ECU firmware etc during servicing, that's why we advise they are told about the map so unless it's really needed they don't do the recreate asany of them are not relevant to us at all, and msybe for example a cold start issue abroad.

If ut us done and they re write the ECU, Yrs we can write the old file back again at a cost , but obviously the update will be deleted as you will have the same software you had before the dealer re write, of this update is needed we would have to fo the whole remap again and build the map into the new updated file.