i have had the car for about 2 months now used and when i got it both windows were working perfectly well.
now they seem to only work when they want to which is almost never.
when they do work they go up and down with no problem.
the dealer informed me the passanger side window was jsut recently replaced.
Any ideas on what i should troubleshoot???
i did check the fuses and none were burned out or non working

 

Our G35s suffer from PIA window motors and the aftermarket/autoparts store motors fail even more often. You need an independent shop that can install new OE window motors at a reasonable price. If you live in SoCal I have several, find at least one in your area....Gary