2006 g35 coupe

So I only have one key that works the car and I was trying to get alarm system on the car, but the way they have to program it is to have a physical key that starts the car, I have that twist **** thing that you could insert a key in and I pulled the key out of the fob and it doesn’t start the car. The car only starts with the fob in the car and that’s the only fob that works the car. I tried three locksmith to try to program another key and a fob, but none of them are successful.


The last locksmith I tried got the car in the programming mode it would not accept the keys at all. He’s telling me you’ve seen this before and it’s usually the BCM. I’m just wondering if I replaced the BCM.

Would it forget the one key that I had program to the old BCM, the car was activated Natts last time he was trying to program keys but it got out but the codes are still there p1614 p1610. I was gonna try NDS-2 on my laptop with the new bcm. Any one ever experienced were new keys wont get accepted??