Car key immobilizer question

[ImpulsiveJames]

Thanks. I also just found this.

Car transponder key cloning?

Can be done but quite tricky but dependant on a few things. It will also come down to the actual system installed. Once you have your Proxmark available, scan your key and we can give you a point in the correct direction. Your best hope is a lf scan and result of HiTag If so This will be your starting document https://www.cs.bham.ac.uk/~garciaf/publications/Dismantling_Megamos_Crypto.pdf