window regulator question

[David M. Hoffman]

'95 G20
The driver's side window on this car is giving me trouble.  The window
will not work at all.  When I use the switch to move the window up or
down, I hear a faint click inside the door (a relay?) but the window
itself does not budge.  Do I need to put in a new window regulator or is
it something simpler?  Is it worth the time to take the regulator apart
and clean it up or should I bite the bullet and buy a new one?  Does
anyone have the Nissan part number for a new one?  Thanks for your help.