I'm really sorry if I'm posting in the wrong area. I'm really frantic and really don't know where to look. I tried searching for an answer, but I only found like one guy that seemed to have the same problem as me, but all he posted was that he took it to the dealer and got it fixed. I also looked in the Infiniti Online Mechanic Forum/Sub-Forum, but it was locked, so I'm trying here.
So on 5/29, I called Triple A to do a battery change. The M35 was still working at the time, but it was just low and the Triple A guy said that it would probably last about a month or so. We decided to change the battery. I drove the car over to a more open area, and then he changed it. Afterwards, nothing in the car worked. If I pressed the button to turn on the car, or even start the ignition, there would be no engine starting or no dashboard lights would turn on. Literally, nothing changes after hitting that button. The steering wheel and brakes locked. Nothing in the car showed electrical usage, except for the headlights and the in-cabin lights.
We brought it over to the Infiniti dealership, and what we though was going to be a ~$150 charge would be $1265. $1265 to replace the Intelligent Key Control Unit or something like that, and that's way more than my mom and I can afford right now since we've been in a bad situation recently.
The people that AAA hired to change my battery, they said they would be willing to pay for it, if the fault was on their end. Also, the dealership technician said that he's seen this before, but there really isn't a way of determining what caused it, so I feel like I'm kind of screwed.
The keys don't work, the ignition button doesn't work, the brakes don't work, steering wheel, and even the windows. I can't even roll up the windows. The only thing that I've seen working is the in-cabin lights and the headlights. That's all.
I mean, I was hoping anyone that's experienced with Infiniti's, or this type of situation, can help me out with information on what potentially caused it, or any alternative fixes. Please and thanks guys.
EDIT: Also, I guess a details I forgot to mention were, I live in California, and they said the part itself was $600+
EDIT 2: Oh and the dealership specifically said they couldn't make any promises on whether or not changing the unit would fix the issue or not. That was just the most "apparent" issue.