Ah makes a bit more sense.
Do I take it if the code box can get corrupted for whatever reason and the code box can be reporogramed usinng a set procedure using the brown key to authorise it.
Is there any difference between a brown key and a red key internally or is it just exterior colour. I guess a red key could act as a master key if the code from the red key is the same as the master that is stored in the ecu?
Never did understand why you didn't used to be able to clone a red key in thge old days. Was it that you had a red key cut then used the brown master key in the ignition to authorise the new red key and the technology wasn't available in the key cutters to read the red key code and clone it.
I guess that would have ment in the older days you would have had 3 separate keys autorised by the master key say code 001, 002, 003 . now if you get 2 spares from timpsons all have the same code say 001,001,001
I have a local mobile key man that I used reciently. He broke into my father inlaws car, removed a lock, key cut and made 2 spares and reprogramed the lock ecu for £140. I guess he would have the equipment to make a master key also.
If this technology is so available these days and it is relativly cheap to do why is everyone still panicing over buying a car without a brown key?