How to Find a Key Number on a Car

Written by rita wood
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How to Find a Key Number on a Car
You will need the key number of your car to get a replacement key. (Microchiped Car Key image by Christopher Meder from

Sometimes it’s simple to find a key number on a car; other times require some investigation. Losing car keys happens to everyone, and you may never find them, or not find them fast enough. If you can find the key number, you can save the time and money it takes to call a locksmith to make a key for you.

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  1. 1

    Check the owner’s manual. For older cars (built before 1980), the key number may be on the inside cover of the manual. The previous owner of a used car may have written the key number somewhere inside the manual.

  2. 2

    Check the glove box. Sometimes the key number is written in the glove compartment.

  3. 3

    Check the key punch-out if you have a new car. These punch-outs have the key number on them. It may also be on the vehicle contract you signed when you purchased the car. If you have keyless entry, call the dealership where you purchased the car.

  4. 4

    Look on the side of the lock barrel on the driver’s side door. The key number could also be written on the interior panel of the driver’s side door, or on the door lock itself.

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