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Kinda true, the key serials are nothing to do with the battery or drive unit, you’re relying on someone manually punching them in before sale to be accessible from the diagnostic. They’re also sometimes available from the receipt / invoice too. (Just pointing out so people don’t get complacent, always write down ur own key codes!). Replacement keys will be ordered through Abus too
If not there you need to buy a new battery lock (and a new Dutch lock if you want your keys to be matching still)
Yep! Get to a dealer or somewhere with the Bosch software, they should be able to plug it in to find the battery serial number. Fully Charged did it for me once, I can't remember if they ordered the key for me or if they just told me how to do it through Bosch. Got it done either way.