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Lexus Key Programming Instructions

by Megan Mattingly-Arthur

The Lexus brand has become synonymous with elegance, comfort, style and affluence. Lexus vehicles from recent models years come with computerized, dealer-programmed Smart Keys that communicate with the engine control unit. If you have at least one of the original master smart keys that came with your vehicle, you can program additional Lexus keys.

Program your Lexus key from your vehicle's driver's seat. Close all of the vehicle doors before beginning the programming process.

Insert your pre-programmed Lexus master key into the ignition cylinder. Turn the master key back and forth between the "On" and "Off" ignition positions five times.

Open and close the vehicle's driver's door six times, then quickly remove the master key from the ignition cylinder.

Insert the new, unprogrammed, key into the ignition. The vehicle's security light will begin flashing.

Wait for the security lights to stop flashing: This indicates that the key has been programmed successfully. Step down on the brake once to exit the programming mode.


  • Repeat this process to program up to three additional Lexus keys.


  • Allowing more than 10 seconds to elapse between the completion of each step will cause the vehicle to exit the key programming mode. If this occurs, return to Step 1.


About the Author

Megan Mattingly-Arthur has been writing professionally since 1998. She has contributed to various publications, including "Teen Voices" and "Positive Teens" magazines, as well as a book, "The Young Writer's Guide to Getting Published." Mattingly-Arthur is studying travel and tourism through Penn Foster Career School.

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