Its a 10mm Allen Key.
Remove the immobilizer unit?
in the key
It's not anything you can do yourself. Any Toyota dealer or well equipped locksmith shop can "flash" the chip in the key.
dealer bring vin
To disable the theft alarm on a 2002 Toyota Sienna, put the key in the ignition and turn it halfway. Leave it in this spot for 10 minutes before starting the car.
Yes, If you look where the blade meets the key on one side there is a circle, the chip sits behind this plug. the transponder chip is a long glass cylinder inside the key.
Try jiggling the steering wheel while turning the key. Sometimes if the steering wheel is in a bit of a bind, the key won't turn.
If the key is grey, then yes.If the key is grey, then yes.
It means the "Immobilizer" or "anti theft system" is activated