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Thread: Can I program a Smart Key myself?

  1. #106
    Registered Member


    Join Date
    Dec 2018
    United Kingdom
    Key fobs, also known as keyless entry remotes, are useful in controlling your car's locks, trunk, panic alarm and even remote starter from hundreds of feet away. These remotes are wirelessly programmed to your vehicle and can be reprogrammed as often as you would like if the signal is lost or if you need a replacement remote. Reprogramming takes only seconds and will have your remote ready to use immediately.

  2. #107
    Registered Member

    2016 Mazda CX-5 Touring

    Join Date
    Jan 2019
    Huntsville, AL

    3rd key fob

    Hi Pele,

    Just wondering how you got the third key fob programmed. I'm in a similar situation with two working fobs and just want to add another on my 2016 CX-5. Thanks.

    -- Jeff

    Quote Originally Posted by Pele2048 View Post
    All of these procedures linked say something about inserting a programmed key into an ignition cylinder and turning from ACC to ON several times.

    I have no cylinder. I have nothing to turn.

    I have two programmed keys. I need a procedure that works on the 2nd gen (2018)

    Does anyone have that procedure?

  3. #108
    Registered Member

    Join Date
    Apr 2019
    I am hoping someone can help me. I have a 2011 CX9 GT with the advanced smart key system (or whatever they call it). We have two working fobs that eat through batteries, so I just bought a used FOB off Ebay (with the key already cut). We don't need the actual key, since we have two. I am trying to program the key following the instructions on the first post for Advanced Keyless System, however have not been successful. I am bringing the two working fobs into the car with the new one. The instructions say to insert the key from the unprogrammed key into the ignition and turn it to on. However, the key itself isn't programmed and so won't turn. I am able to turn the switch without the key in it a little, then insert the key which allows me to turn it to on and ACC no problem. However, following the programming instructions does not work.

    Here are my questions. Does it matter that the FOB is already programmed for another car? Is there anything I should do with the new key that is cut for another car? Should I use one of the other keys during the programming process, or does it have to be the new key? What else could I be missing? Any help is appreciated!

  4. #109
    Registered Member

    Join Date
    Sep 2019

    Yes you can (FORscan)

    I just made 2 new keys for my 2010 Mazda CX 9. I followed more or less the instructions here: and here: Actually using the latest version of FORscan (free) and their 3 month extended license (also free). 2 blank switch blade keys I got from Amazon, and a ELM327 Bluetooth OBDII Adapter I got in Amazon for like 9 dollars (Autozone, or Walmart seem to carry them as well). The local dealer had quoted me $325 for one key. Instead following the procedure I got 2 keys for $50. When buying the blanks, make sure they have the same electronic description as your current key (mine matched exactly). And to be sure, do NOT erase keys before you know for certain your blanks can take the programing (so program them as spares). Once you know they program correctly, you can erase all keys (in my case to remove the lost key in memory).

    Actually, my main issue was cutting the key. Nobody in this tiny town wanted to cut the Amazon blanks. What I ended up doing is that LOWES cut the keys in their own (dumb) blanks. They I dissasembled the switchblade blanks from Amazon (the shank of a 5/32 drill bit can be used to tap the spring pin out, and the 5/32 drill bit you can also use to make the right hole in the LOWES blank) and taped that and the blank from LOWES (after removing the plastic). Then I cut and filed the LOWES blank to exactly match the Amazon blanks. Then swapped them. It worked.

  5. #110
    Biggie T Skinny helbigtw's Avatar
    CX-3, CX-5 & CX-9 Moderator

    08 CX-9 GT Fwd, Bose/Nav, BSM,Compass/Homelink, Pwr Lift,Tow

    Join Date
    Feb 2011
    Pittsburgh, PA
    It is a little different for smart cards vs switchblade type keys. Whole different system with sensors and rfids both in the emergency keys and the cards.

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