Hi fellow G37 peeps,
My windows give me grief now and then. I have a 2009 G37 coupe and I love my car. It's black on black. When passenger side window on my coupe kept rolling down that half inch and staying there, my mechanic re-set it. He said someone (perhaps at the carwash or a rare passenger in my car) had held the window control down for too long and messed up the auto functions. This worked. He didn't have to remove the door panel or anything complicated.

Next, my driver side window decided to roll half way down after I'd exited the car and closed the door. It took 3 times, but I after researching (thank the STARS for this site) how to re-set it, I finally managed to get it to work again....for now! Fingers crossed.

Here's how I did it: I got in the car, closed the door, turned power on with start button by pushing it twice --without starting car--, held window control button down continuously to roll window completely down and held it for 10 seconds; held window control button continuously up to roll window completely up, and held it for 10 seconds. Then, I tested the auto function by briefly pushing window control button/lever down. The window rolled all the way down. Then I briefly pushed window control button/lever up, and the window rolled all the way up. I exited the car, nervously because this hadn't worked at all last night and I had to leave my window down for the entire night, closed the door, and voila! The window stayed up! I locked the door and still, the window stayed up. Let's hope it lasts!

I had called my mechanic this morning to ask about the re-set. These guys have been good to me so far, and have an independent Infiniti repair shop. The first thing this mechanic says is, "It's probably your motor". He quoted me $435 for the motor (part) plus labor. I find it suspect, since the other door has had a similar problem within this past year. Could it be that BOTH motors are failing? It doesn't make sense to me, and seems more like a computer/contact issue, or that I was rolling the window up and down a lot the day it failed, and I somehow messed up the auto function. In today's world, most mechanics are so quick to just "replace" whatever is wrong, rather than diagnose and fix a problem.

 

Recently had my battery replaced, then began to have this problem with the passenger window. Tried this procedure and Wa-la. Works Like a charm.
thanks for your contribution.

 

@TVD I just had the same problem with my G37 here in NZ and this worked perfectly! Thank you!