left front & rear power window not working; right front & rear power window DO WORK

I had the same thing happen to me. My windows seem to come and go, sometimes they work sometimes they don't. Last time I had it brought in to check they said I needed a new door window regulator and said it would be $200-$300. Most of that was in labor as they have to take apart the door. Your best option is to go to www.repairpal.com/directory and input your zipcode. Click on a couple of the shops and under the Amenities section it will list whether they provide free estimates.