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Toyota,Lexus SMART key unit Denso Memory device is serial eeprom 93c86 SMD8 package.
Exected file size is 2048 bytes.
Use ORIGINAL Toyota and Lexus keys ONLY.
Programmed key will start vehicle when you put it near START button.
HandsFree function WILL NOT WORK.
To activate it,you must reprogram key by OBD2.