For clarification about car keys and basing my answer on a Citroen C3 that i had to duplicate the fob …
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Car keys in general have 3 components :
Key blade - that operates the cylinder and have to be duplicated by cutting a compatible blade with a machine or laser or whatever - this makes the cylinder rotate to open the doors and rotate the ignition switch
SubGhz Radio - Sends a rolling code for example on 433.92 Mhz to open and close the doors by radio like on a garage door, etc …
Hitag2 or similar chip - Inside the plastic key compartment that is read like a 125khz RFID when is close to the ignition switch and allows to unlock the injectors if the key/code/data is valid - works as protection - hitag2 is not clonable but have pages of data like for example a Mifare Classic or Coges key.
Now the issues … The radio on the remote to open and close the doors have to be “inserted” on the car central unit for it to operate. When it looses sync but it’s programmed on the car you can turn on ignition and keep pressed a close or open button for some secs for it to re-sync but it needs for the FIXED KEY PORTION OF THE FOB TO BE ALREADY PROGRAMMED on the car !!! And the way it’s programmed is coollll
Because now you have something like a SBB Pro and you want to inser a new remote on the car so how do you do it ? The remote FIXED KEY is encoded on the 1st, 2nd and 3rd page of the HITAG2 so what you insert is the HITAG2 by programming it on the car and NOT the remote !!!
So i buy a new key and cut the blade so it will rotate the cylinder but to unlock the injector i need the HITAG2 to be programmed and when i do programm the HITAG2 using the programmer (inser it on the car as a valid key) i’m also programming the serial of the remote assuming it’s a pre-encoded HITAG for that “blank” key.
To re-use a cytroen C3 remote for example i have to grab the fixed portion of the “key” the remote itself sends and then encode that on 1st 2nd a 3rd page of the HITAG and then insert the HITAG2 on the car by OOB programmer…
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You can’t simply make the car accept a flipper made remote or whatever remote by programming that on a car like on a garage door … you have to know how to extract the fixed portion of the remore code and encode that on the HITAG because what you insert/programm on the car is the HITAG and with that you are programing the remote as well.
Since the advent of remote technology, many car manufacturers have begun crafting vehicles with locks that can be opened using nothing more than a key fob. With possession of a key fob, the owner can simply press a button to open the door, and many have the ability to be able to press a button to start the car, as long as the fob is inside.
Unfortunately, if a car owner misplaces his or her key fob, or wants to make an extra copy, the dealership may claim that they have proprietary rights over the device, and, as such, only they can make a copy and program it, which comes with an absurd fee. In reality, however, while creating a new key fob, as well as programming it to work with your car, may require the assistance of a professional, a skilled locksmith can aid you with this effort without requiring you to head back to the dealership for help.
But Wait – is it Against the Law to Make a New Key Fob without the Dealer’s Permission?
Some dealers may even assert that creating a new key fob is against the law if this task is not performed by a licensed operator. But while this may be the case with a leased or rented car, it is likely within your rights to make as many copies as you would like with the help of a professional.
And getting a key fob programmed to operate with your car is certainly not an extensive task, either. While you should not attempt to make a copy yourself, with the help of a professional locksmith you can have a new key fob in relatively short order.
Contact A-1 Locksmith Today – We Can Help You with Your Key Fob
If you have lost the key fob to your new car, or you would like a new one made to give to a friend or a family member, don’t head back to the dealership. Instead, reach out to the professionals at A-1 Locksmith today in Dallas. We have experience programming key fobs, and we have been offering our expertise to residents of the DFW for over 65 years. Call us today and learn how we can be of assistance.
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