I have a 1999 Ford Explorer Sport (two door). It is an okay car looks wise. Mechanically it is horrible.
I bought the car as a secondary car because I had extra money. I paid 3,000 for it with 147,xxx six mouths ago. Anyways, after I bought it, the check engine light came on.
The mass air flow sensor went out on it, and also the power steering was a bit whiny (Ford said it was normal for Ford Explorers; none the less it's still annoying) and it needed some TLC new spark plugs, spark plug wires, flue filter, oil, etc.
The tranny is starting jolt while shifting around 45 mph.
The back seat belts (both) don't lock when stopping fast. My friend's brother found out the hard way.
Stock speaker are terrible; I installed new ones from Best Cost around 150 for front and back simple to install. The sound quality is night and day.
I also have problems with the back windshield wiper; it doesn't work properly.
The air intake is making a horrible sound, almost like a buzzing sound that stops every once in a while.
The power lock motor went out on the passenger door. (it's not worth fixing, but it is very annoying).
I recommend putting fully synthetic motor oil in it, since it is a high mileage vehicle, I put mid grade gas in also. Always keep your coolant reserve (tends to use a moderate amount on mine)
If you want take off a little extra weight for better gas mileage, take the spare tire off.
Oh also.. I just had to fix my air conditioning. It was an easy fix; there are two O-rings that right behind the compressor shaft. These O-rings hold in the freon. They may go, they may not, so if your air goes out, that maybe the reason. It's a 2.99 fix plus freon, which is 23.00 a bottle. I used almost two of the big bottles that came with the gauge attached to the bottles. The cheap ones are not good and are hard to use. I tried both!!!