Losing or needing an extra key for your Lexus can be a hassle, but programming a new key or remote doesn’t always require a trip to the dealership. For many Lexus models, you can program your key fob yourself, saving both time and money. This guide provides a general procedure based on common practices for Lexus and Toyota vehicles, giving you a starting point to get your new key working.
While specific steps can vary slightly depending on your Lexus model and year, this method outlines a typical process that often works for a range of vehicles. Always consult your owner’s manual for the most accurate instructions for your particular Lexus.
Understanding the Programming Procedure
The process usually involves a sequence of door operations, key insertions, and ignition turns that put your Lexus into programming mode. Once in this mode, the car is ready to accept the signal from your new key fob. It’s crucial to follow the steps precisely and within the given timeframes for successful programming.
Step-by-Step Guide to Program Your Lexus Car Key
Before you begin, ensure you have your new, unprogrammed Lexus key fob and that your car is in the correct starting condition:
- Driver’s door is open and unlocked.
- Key is out of the ignition.
Now, follow these steps carefully:
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Insert and Remove the Key: Place your current key (or the new key if it’s cut to fit) into the ignition switch and remove it twice within 5 seconds.
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Door Cycling (Part 1): Within 40 seconds of step 1, close and then open the driver’s door twice.
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Key Insertion/Removal (Second Time): Insert the key into the ignition and remove it again.
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Door Cycling (Part 2): Within 40 seconds of step 3, close and open the driver’s door twice again.
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Insert and Leave Key in Ignition: Insert the key into the ignition switch one last time and leave it there.
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Close the Door: Close the driver’s door.
- Note for Specific Models: For some Lexus models (and certain Toyota models as indicated in some procedures), steps 5 and 6 might be reversed. This means you should close the door first, and then insert the key into the ignition. If the standard procedure doesn’t work, try reversing these steps. This variation is less common for Lexus but worth trying if you encounter issues.
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Select Programming Mode: Turn the ignition switch from “Lock” to “On” and back to “Lock” repeatedly at approximately 1-second intervals to select the desired mode. The number of times you turn the key determines the mode:
- 1 time: ADD mode (adds a new remote without erasing existing ones).
- 2 times: REWRITE mode (erases all existing remotes and programs new ones – use if you lost a key to prevent unauthorized access).
- 3 times: CONFIRMATION mode (confirms the number of remotes currently programmed).
- 5 times: PROHIBITION mode (disables remote programming – generally not needed for standard key programming).
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Remove Key from Ignition: Take the key out of the ignition switch.
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Confirmation of Mode: The power door locks should now cycle (lock then unlock) a number of times corresponding to the mode you selected in step 7. This confirms that the car has entered programming mode and recognized your selection. If you selected Confirmation or Prohibition mode, simply opening the driver’s door will complete the procedure after the locks cycle.
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Program the Remote (for Add or Rewrite Modes): If you are in ADD or REWRITE mode, proceed within 40 seconds of the door lock confirmation:
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A. Press and Hold Both Buttons: Press and hold both the Lock and Unlock buttons on the new remote simultaneously for about 1 to 1.5 seconds, and then release them.
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B. Press Lock Button: Within 3 seconds of releasing both buttons in step A, press and hold the Lock button on the remote for more than 1 second, and then release.
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Success Confirmation: If the keyless entry remote transmitter has been programmed successfully, the power locks will cycle “lock” to “unlock” once.
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Failure/Troubleshooting: If the locks cycle twice, it indicates a problem. Double-check that you have the correct remote for your Lexus model and repeat the entire procedure from the beginning, paying close attention to timing and each step.
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C. Program Additional Remotes: If you need to program more remotes, repeat steps A and B for each additional remote within the 40-second window.
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Exit Programming Mode: Open the driver’s door. This action should conclude the programming mode.
An example of a car key and remote, similar to those used in Lexus vehicles. Programming these devices can often be done at home with the correct procedure.
Troubleshooting and Important Notes
- Timing is Critical: Ensure you perform each step within the specified time limits. If you exceed the time, you may need to start over.
- Correct Remote: Verify that the new remote is compatible with your specific Lexus model and year. Using an incompatible remote will prevent successful programming.
- Owner’s Manual: Always refer to your Lexus owner’s manual for the most accurate and model-specific instructions. The procedure outlined here is a general guide and might have slight variations.
- Battery Condition: Ensure the batteries in your new remote are fresh and have sufficient charge.
- Professional Help: If you encounter difficulties or are unsure about any step, it is always best to consult a professional locksmith or your Lexus dealership. They have the expertise and tools to program your key correctly.
Programming your Lexus car key yourself can be a convenient way to get a new remote functioning. By following these steps carefully and being patient, you may be able to avoid a trip to the dealer and get back on the road quickly.
