How to Replace Lexus Keys With No Key Number

Written by lisa bass
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How to Replace Lexus Keys With No Key Number
Lexus uses a unique key card transmitter to lock, unlock and start your car. (Key image by Monika 3 Steps Ahead from

Lexus, a line of luxury vehicles manufactured by Toyota, uses its "SmartAccess System," a keyless access card, to lock, unlock and start its cars. The system is a transmitter that works from as far away as 20 feet as you approach the car. The key includes a number that's unique to each Lexus, so replacing it isn't as easy as having a generic key cut at a hardware store.

Skill level:


  1. 1

    Look for the key card that came with the car. It should contain the number for the key. You can use that number to call a dealer or high-security locksmith and get a new key. The card can often be found with other ownership papers and manuals that you received when you got the car.

  2. 2

    Contact the dealer where you bought the Lexus. If it's a Lexus dealership, they may have retained records so you can get a key without knowing the unique number. This would probably be a good time to ask them for more than one duplicate key, as well as the number.

  3. 3

    Find your vehicle identification number. It's usually a string of 17 characters stamped on a plate on your dashboard, underneath your windshield. The VIN can help your dealer or locksmith identify the type of key you'll need.

  4. 4

    Collect your ownership papers and identification. Your car dealer or any reputable locksmith will want proof that you own the car before handing over a new key. It's a good idea to have a driver's license, passport, car title and registration to prove your identity and ownership.

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