Not much has gone wrong with this truck since I got it. I've replaced the brakes - front and back, the alternator, the tires, the passenger air bag indicator light and had the cruise control serviced under the recall on it. I consider most of those things to fall under general maintenance, and I always use good oil and filters - no cheap stuff.
There have only been a couple of things that I think were outside what I would consider normal. The first was that airbag light, and the second was the door light kept saying that I had a door open when I didn't. It mainly did it when it was cold outside, and my boyfriend replaced the sticky sensor and fixed it.
I bought this truck because it was the cheapest/newest one I could afford at the time, I really wanted a Toyota but they cost too much for me then.
That being said, I have been pleasantly surprised by my Ranger. I have driven it a lot, through all seasons and on lots of different terrain and it takes everything like a champ. It has always been very reliable for me and we've road tripped it many times.
I can also say it's no slump in a race - I have beaten two cars that it technically has no business beating - that 4.0 just roars when I get my foot in it.
Sometimes I think about trading it in now that I can afford it, but then I think why? It does everything I need it to do. The mileage isn't that great - about 20 on the hwy - but I have friends who get worse with their SUVs, and whatever I bought wouldn't get any better, so I keep it.