Looks like I have a similar problem, but could it be the window switch instead?

My window works super smooth up and down as well as door open retract, but only 1 out of every 5-7 days. The other days the switch does nothing and no open/close retract. Before I open the motor up, anything I should try?

 

^^thats the motor slowly going out. honestly id jus replace the motor ONE time instead of constantly opening each up

 

That's a shame, ridiculous that the part is so expensive.

 

Releasedtruth, try rebuilding the motor instead. I got two replacement brushes for $2.59.

Only thing I would add to the instructions is the suggestion to make alignment marks on the armature shaft and motor housing so you can slide it back in exactly as it came out. With one motor I had no trouble, but the other I fiddled with it forever trying to get it back in, many beers later I rotated it just right and it dropped right in.

 

for all of those replacing with aftermarket motors, do they roll up at same speed as the other windows?

 

^^yes

 

ahh another task to complete on my ride once I get back! Thanks OP

 

Great write up. Thanks for taking the time to help your fellow G35's!

 

Gotta give props; this worked like a charm...just finished the driver's side and all is good in da hood...

 

This is a great thread and an even better sticky.! I don't really like to work on my car because i would rather pay someone.. i don't like gettin frustrated these days.. anyhow.. i did the removal of the door panel and the cleaning of the motor and everything put back together in about an hour.. stoked to save money.!!



EDIT: Thank You

 

First time poster. Great forum and great sticky. I just finished cleaning the motor and the window works great. Thanks for all the pictures and procedures.

 

Thanks for the great DIY. I was able to follow this and fix my window. The motor was just a little dirty. Took me about an hour and saved me hundred$.

 

Thank you, you are god! lol

 

Now Would anybody know how to fix this issue:

My back window will only go down not up.... i removed the motor and door panel from the other side to trouble shoot and try to figure out whats going on and the motor and switch works fine on the right side but when i try it again in the left hand side it wont go up>>>

please help

 

nice write up