Went to start my '04 GX350L after filling the tank up from a day of driving and there was NO power - no lights, no radio, no nothing! I popped the hood to check battery (both cables are tight, very tight) and then the car started up no problem. All the presets went back to factory defaults and the radio had to be reprogamed. I was able to start and drive the car no problem for a couple days, then the same thing happened!?

Any ideas how the car can be completely dead and then fire up? I am going to replace the battery and hope that solves the problem, but wonder if anyone has had the a similar issue and what the solution was.

Thanks!

could just be the battery but get the charge system checked. other possible cause could be bad earth/ground connections on the engine