Window Problem

I have a 2001 Sonata.Rear side passenger window fell down when door was closed yesterday. I opened inside door panel to check...I have done this before on front door to put window back in track.
Window is in track.
Motor will not bring window up...I pull window up manually.
It will not stay in closed position?
Thanks for Your Advice in advance.

I have a 2001 Sonata.Rear side passenger window fell down when door was closed yesterday. I opened inside door panel to check...I have done this before on front door to put window back in track.
Window is in track.
Motor will not bring window up...I pull window up manually.
It will not stay in closed position?
Thanks for Your Advice in advance.

It's probably the regulator. Part # 83404-38011 List is $56.66. I can do $43.00 plus a few bucks for shipping if you want it. I have one in stock. It's # 83404 in the following pic. Usually the plastic pulleys on each end break, or the cable breaks or gets bound up.

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