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10-05-2022, 04:29 PM | #1 |
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Coding a new transponder key
I purchased a key fob blank and had it cut today. Now I need to get it to start the car and have the key fob lock/unlock the doors.
I've seen a few procedures online regarding programming the fob - along the lines of holding down one button, pressing another 3 times, etc. But how would I program the car to recognize the key and actully start the car? Do I use NCExpert or Dummy or some other software? |
10-05-2022, 04:36 PM | #3 |
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10-07-2022, 02:02 PM | #5 |
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10-07-2022, 02:32 PM | #6 |
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Here's an older post from the euro Z4 community that has a procedure, then another link that has much more detailed steps for the same procedure.
https://z4-forum.com/forum/viewtopic.php?t=33506 https://www.pacificbmw.com/manufactu...MW%20key%20fob! |
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10-07-2022, 02:44 PM | #7 |
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Thank you. These directions are for programming the key fob - the lock, unlock and trunk release buttons. The fob on my second key works as I followed these instructions originally. However, the key still does not start the car.
I believe there is a transponder in the key. The ECU needs to know what the transponder key number is so that the computer will allow the car to start with the second key. How can I program the ECU to accept the new key when I don't know what the transponder code is? I was hoping there was a way I could connect my computer to the OBD port, but the key in the ignition and tell the computer to add the key. |
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10-07-2022, 05:00 PM | #9 | |
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10-07-2022, 05:32 PM | #10 |
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Holy crap. Thanks for the link. Maybe if I take the same meds the narrator is taking, I will be calm enough to dig into one of the circuit boards.
Definitely not a straightforward process as was mentioned in an earlier post. |
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10-14-2022, 01:08 AM | #13 |
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If you can't program it yourself then try calling a mobile locksmith or taking it to an automotive locksmith and ask them if they do it. Tell them what type of car. I've experienced a couple times (my old mazda with active keyless entry/start, and a friend's Infiniti with keyless start) where people on the forums swore only the dealership could program keys but a mobile locksmith was able to easily do it for a fraction of the price. Locksmiths can program for the ignition as well as the doors, especially if you have an existing key.
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10-17-2022, 08:53 AM | #14 | |
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I am surprised that there is not a way to code directly to one of the ECUs using Expert or Dummy programs. |
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10-17-2022, 01:02 PM | #15 |
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