Lost or damaged your Lexus Is300 Key Fob? Replacing it can be expensive if you go directly to a dealership. However, the good news is that you can program a new or replacement key fob yourself, saving you both time and money. This guide provides step-by-step instructions on how to program both the key and the remote for your 2001-2005 Lexus IS300. Many owners have successfully used these methods, and you can too.
Key Programming Instructions
Before you begin, ensure you have a working master key. This procedure will not work with a valet key. Speed is also important in this process; try to perform the steps promptly for the system to enter programming mode.
Here’s how to program your Lexus IS300 key:
- Insert your existing, programmed master key into the ignition. Do not turn the key.
- Press and fully release the gas pedal five times.
- Press and fully release the brake pedal six times.
- Remove the master key from the ignition.
- Insert the new, unprogrammed key into the ignition.
- Press and fully release the gas pedal one time.
- Wait for one minute. During this time, the security light on your dashboard will blink. Once the security light stops blinking, your new key is successfully programmed.
- To finalize the programming process, press the brake pedal one time.
Understanding the Security Light: Pay close attention to the security light on your dashboard. It’s your guide throughout this process. In step 1, the security light should turn off. It will remain off until step 6. After step 6, the security light should turn on and begin to blink, indicating that the programming sequence is in progress. If the security light illuminates after step 4, it indicates an error, and you should stop and restart the procedure from the beginning, ensuring you are using a master key and performing the steps more quickly.
Remote Programming Instructions
Programming the remote functions for your Lexus IS300 key fob is a separate process but equally straightforward. Follow these steps carefully:
- Ensure all doors are closed and locked. Then, unlock and open only the driver’s side door.
- Insert your key into the ignition and immediately remove it. Do not turn the ignition on.
- Using the power lock switch on the driver’s side door panel, cycle the locks five times. Perform a Lock-Unlock sequence five times in quick succession (Lock, Unlock, Lock, Unlock, Lock, Unlock, Lock, Unlock, Lock, Unlock).
- Close and then open the driver’s side door.
- Again, using the power lock switch, cycle the locks five times (Lock, Unlock, Lock, Unlock, Lock, Unlock, Lock, Unlock, Lock, Unlock).
- Insert the key into the ignition. Turn the ignition to the “ON” position, then immediately turn it “OFF” and remove the key.
- At this point, you should observe the door locks cycling automatically. They will lock and then unlock to indicate the system has entered programming mode. If the door locks do not cycle, you are not in programming mode and must restart from step 1, ensuring you perform the steps quickly and correctly.
- Take your remote key fob. Press and hold both the Lock and Unlock buttons simultaneously for no more than two seconds.
- Immediately after releasing both buttons, press the Lock button on the remote for no more than one second.
Upon successful programming of the remote, the door locks should cycle one time. If the locks cycle twice, the programming attempt has failed. Common reasons for failure include a weak signal from the remote. Try standing outside the car while performing steps 8 and 9, and ensure you are not holding the buttons down for too long. As long as the car remains in programming mode (indicated by the door locks cycling in step 7), you can repeat steps 8 and 9 until the remote is programmed. If you wait too long, the system will exit programming mode, and you will need to start over.
- To exit the programming procedure, simply close and open the driver’s door.
Now you should have successfully programmed your Lexus IS300 key and remote. Enjoy the convenience of your newly programmed key fob!
