I used to lease a new truck every three years when I owned my own business so I never had them long enough for expensive things to break. A set of tires and front brakes was about all I'd have to get. With my '08 Trac circumstances conspired such that I kept it for 13 years and 212,000 miles. Trans crapped out at 132k but like I said, on the Sport Trac boards almost everyone has to get their trans rebuilt between 100k and 150k whether they change the fluid or not. I put on two thermostat housings and three alternators, a water pump which I regard as normal. Nine front wheel bearings, most of which were replaced on warranty or extended warranty by the dealer. Discussion on the ST boards we kinda traced the wheel bearings to improper installation by the dealer using an impact wrench on the hub instead of properly torqueing them. The last pair I had done at a Ford dealer in Florida who must have done them right because they were fine the last 60,000 miles I owned it. I changed the oil every 5000 also, with synthetic, and had none of the timing chain issues that people complain about because it's an expensive fix. Until it blew a head gasket it ran like new and didn't use any oil. Did have some HVAC problems that I attribute to quality, plenum door arm, blend door actuator, and blower motor resistor. Blend door actuators are something that gets brought up a lot on the ST boards. It's not terribly hard to change as long as you're flexible. Everyone is having the same things wear out on their Tracs about the same time now, like the blend door actuators and carrier bearing on the rear driveshaft. For whatever reason on a 2wd you can replace the bearing but on a 4wd you have to replace the whole driveshaft. $1300 from Ford, $950 at NAPA, $300 at Rock Auto so you know which one I got and changed it myself. Can't complain about something made of rubber wearing out at 180,000 miles but you wonder about the design in the first place.