What is the purpose of the barcode on the spare key?

1 Answers
VonEmmanuel
07/25/25 6:15am
The barcode on the spare key is a matching code set by the manufacturer, used to query the records of the vehicle's installed central control module and anti-theft module. Functions of the spare key barcode: In case the primary key is lost or damaged, the information of the central control module can be quickly queried through the barcode on the spare key, allowing for key replacement. Otherwise, the entire central locking system of the vehicle would need to be replaced. Key blade number of the spare key: The key blade number is a fixed code assigned by the car manufacturer during the production of the door locks and ignition switches to prevent car theft. Each key has a unique blade shape, and to facilitate manufacturing and management, each key is assigned a specific code, known as the key blade number.
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