Create a new car key

Sub-GHz
#1

Hello ! I have received my Flipper zero yesterday, and am having a lot of fun with it. I still don’t know how to use it so I need some advices.

I’m aware that this question must be asked often, and I’m sorry for that.

I would like to use flipper zero to open my car remotely. I don’t have any key to read, so i wanted to add it manually. I don’t think it use rolling code since the car is from 1999, so i tried with princeton_433. (I was looking to shop a key for this car and the frequency is 433.920)

I followed the step to bind a new key, but it didn’t work (the step are below). I don’t know if I used a wrong protocol or if there is something else to do to make it work. Thanks for you help.

The step to program a new key :

  1. Switch the ignition to ON (position II).

  2. Within 5 seconds, press and hold the lock button on your remote for 10 seconds.

  3. Release the lock button, then switch off the ignition and remove the key from the ignition, do a test!

#2

I have read tons of articles and noone ever could emulate key fob with flipper. You don’t seem the kind of person will get it…

2 Likes
#3

Several problems :

1- You need exact signal and exact protocol even if it’s not a rolling code (and most likeli is) so you are out of luck trying garage protocols on cars.

2- Even if you have an original key with correct protocol and code you still need to insert that on car, as the procedure you describe is to re-sync only meaning to make a fob that is inserted on the car but not i sync to work again. You need to programm the new key on the card with special programmer, for example for very old models with something like SBB Pro (like I used on the citroen).

3- Many cases like the citroen you don’t even programm the key fob remote, you do programm the hitag (imobilizer) that have on it’s 1st, 2nd and 3rd page of code info on the serial number of the remote. Works like this, hitag have unique ID that you can’t copy so you need to insert that on car by programmer, so you do programm on pages of that Hitag the serial of the remote (radio part) - signal code that is send to the car and when you do insert the hitag by programmer on car it will accept the fob as well.

4 - You would need decoder function for cars on flipper that you don’t have and if you don’t have the only way would be to have a key that was using fixed code or exploit a rolling code by record several presses of the key and hope to re-sync. With that data you would need to insert the key on the car using programmer and only the flipper recording would work.

1 Like
#4

I think we haven’t seen this yet because people are focusing attention on cloning or cracking key fobs which is the more difficult problem. If the right group of people were to focus on simulating new fobs maybe we would see some traction. It’s a difficult problem because you need the right test equipment which is a car. Not everyone want’s to potentially brick their car and pay someone to unbrick it.

1 Like
#5

I want to make a copy of Keri System Card but having a hard time please help if you can