My radio won't work, my A/C is stuck in the ON position and I cant access the front or rear defrosters. I took it to get looked at an d they say its not any fuses but instead some part called a Control Unit which costs well over a thousand dollars!

Is it even worth it with 140k in mileage?

 

Buy an aftermarket radio install kit for the infiniti & put an aftermarket head unit in it. The stock unit is on the same circuit board as the ac/heater controls and are notorious for problems, I would recommend putting a double din unit in with all the perks.