How do you disable the anti theft system in a Lexus SC300?

To disable the anti-theft system in a Lexus SC300, you can try using the key fob to unlock the doors, as this often deactivates the system. If that doesn't work, insert the key into the ignition and turn it to the "On" position without starting the engine, then back to "Off" five times in quick succession to reset the system. If these methods fail, consult the owner's manual or a professional for assistance, as tampering with the system can lead to unintended issues.