Here's how to program a new Lexus or Toyota key immobilizer and remote to work with your vehicle.
On newer model Toyota or Lexus vehicles built in the past decade, programming a key requires Toyota's Techstream software. It can no longer be programmed manually using the "pedal dance" method demonstrated here:
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A spare blank master key was purchased from eBay. Since a blank key cannot be inserted into the ignition, its remote and transponder was gutted from the key shell and inserted into the original master key's shell for programming.
Toyota's techstream software uses a special cable to connect to the OBDII port and communicate with your vehicle's ECU. For a demonstration, see this video:
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Once the key is inserted and turned to the ON position, the key transponder wizard is opened in the techstream software.
Follow the wizard to reinsert the original master key, then remove it, then insert the new blank key, waiting 75 seconds for it to be programmed. The key will then be programmed for the engine immobilizer, though the remote will still have to be programmed separately.
To program the remote, you don't need Techstream software.
Simply follow the instructions to open and close the door a few times and turn the key in the ignition to put it into programming mode. Then press and hold the buttons on the remote and the locks will cycle indicating it has been programmed.
The eBay key purchased worked fine for starting the car, however the remote proved to only work intermittently, so buyer beware. Its better to buy a cheap key shell with a blank blade and a used OEM remote and reprogram it for your car than to use the aftermarket transmitters which are hit and miss.
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