My 03 Sport XLT, though purchased after 87k miles, I can proudly say I hit 100k (300 miles ago) and no major problems. The previous owner had the ford service repair book that was well documented with notes about every visit (I am talking every 2400 to at most was 3300 miles per the book). I can say, this one has been maintained very well. The biggest problem was the axle exploding where the c-clip goes on the rear right side.. Other than that, does not burn oil, has some squeaks, but it's 10 years old. Transmission does not show even the slightest bit of wear (thank goodness lol). Motor is in great condition, and no leaks whatsoever on the whole truck! Maybe I got the pick of the litter, but I can say there is no way have I been disappointed with my Ex..except gas mileage
but I didn't purchase it for that reason, so I don't even consider that a problem.
Really sucks to hear about someone with an old lemon, especially an aged woman. Luckily you have been able to fix (from what it sounds like) most of the minor issues for her. I know you mentioned she cannot afford a new vehicle or a different one, but honestly if she/you sold this Explorer would you feel comfortable with what she would be able to purchase after selling the Ex? I know I would never allow such a thing, especially since knowing what work has been done or needs to be done rather than not knowing at all and finding out the hard way...again. At least at this point you know and have addressed most issues, and really for something to come unexpected is slim, though it can happen, I just do not see it as a safe/smart decision to get rid of the Explorer unless she goes to a vehicle under warranty. Also, explorers do not hold great re-sale value, so if using whatever funds you get from it only is what is going to the next vehicle, you are going to end up paying for something just as bad if not worse. Even if she/you are able to put more money down, you are still looking at a good chance of buying someone else’s piece of crap vehicle.
I understand you are frustrated, but all those used vehicles being sold, most owners were just as frustrated, hence why they are for sell.