How do Car locksmiths re create a key without the original just using a VIN number?
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The manufacturer will have records of the key codes, the heights of each cut in the key, or for electronic ones, the codes stored on them.
For a physical key, they’ll either need to get the key code (cutting pattern) from the dealer, or they can in some cases pick and decode the physical lock.
For electronic keys, whatever body controller handles it will have a list of which valid key codes can be used. Often there is about 10 slots available, the first few come with the car, and the remainders are for spares. This list of keys will be in the car, and also on the dealer’s database.
Order from a dealer, and they’ll look up a valid code and program it into a new key.
They don’t have them ready made and trays of spares for each car, they’ll be made from blanks if and when they are needed.
For the aftermarket, they’d go into whatever module has the codes, find a valid set and program into a new key too.
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