The issue I have, my Nissan will, at times, lose electrical power while driving. The first time this happened I had it towed to the shop. They said that when they got the car that it just started right up. He checked for codes and got Mass Air Flow Sensor. Which he cleared and the code never came back. This issue has happened multiple times now and sometimes it will die for a few seconds and come back to life and other times it will die and I will be sitting on the side of the road for awhile. Now, every time it dies, no power everywhere EXCEPT the sound for the hazards (hazard lights and the light indicator on the cluster do not come on) and the Security Indicator Light on the cluster will blink. The normal blinking rate. So far no one can figure out what is wrong. Now, the battery is brand new(4 months old) all fuses are still good and the battery leads and connectors are clean and tight. I don't have a key fob just the key itself. Could the key need to be replaced?