Car key chip types and their role in replacement

https://alpha-wiki.win/index.php/Car_key_chip_types_and_their_role_in_replacement

When replacing car keys, the chip type matters a lot. Older cars often use standard RFID chips that just need basic programming, while newer ones use encrypted transponders that require dealer-level tools to sync with the vehicle's immobilizer. Some chips are built into the key fob, others are hidden inside the physical key. Getting the wrong one means your car simply won't start.