One thing that annoys me quite a bit about my coupe is a slight difference in window motor speed. Passenger side window slides up/down about half a second faster than driver side window. Can it easily be fixed? Is it covered by the warranty?

 

Unless the window motor is somehow defective then I can't imagine that it is a warranty repair. I really doubt that you will find a dealer that will say a motor is defective because of a slight difference in speed. Window motors are a common problem on these cars but until it goes out you will probably have to live with it.

 

Did you roll both windows down and then do a race to see which one closed faster? lol... j/k ...

 

Passenger side window always wins. Not much fun in this race...

 

yourdoinitwrong, I agree, it is unlikely to be covered by the warranty due to minuscule importance of the problem. But I have to admit my G35 is the only car I observed this problem in. Well, if we don't count my old Lada 2109 with crank-style window controls