That's not hard. I took off mine few months back to se how it looks under the cover. Took me 1-1.5 hour to take everything off and put it back.

Tht's when I saw the Bose speaker says assembled in Mexico. LOL

 

When my window was having this issue, extremely slow goin up and down, I took it to the stealership. The tech came out, reset the windows and after 30 seconds I was driving away with all my windows rolling up and down properly.

 

Had the same problem. Get some spray silicone lube and sprays the tracks with the window down. No need to remove the door panel.

Good luck.

 

good to know guys, except for the mexicans in my door, I'll pretend I didn't see that. hahaha!

 

Had the same problem with my 2001 Pathfinder AFTER A FEW YEARS of ownership. The window motors were wearing out. It was out of warranty, i never replaced the motors but spraying some wd-40 in the window wells did help. i suspect that motors were damaged from previous "frozen" conditions, where if under quick freeze weather conditions [common in the NE], rain / moisture gets into the tracks, freezes overnight, then if you go to open the power window, they're stuck. Forcing that will damage the window motors for sure....

 

+1 on that i did it on mine and it worked just fine just wind down teh window and spray then wind up and down a few times and itll b fine