Since 140k, new radiator, power steering pump, water pump, main belt, various suspension work, A/C serviced twice (still needs service), new transmission at 203k.
Comfy car, big and heavy. Fairly reliable, but watch out at high miles.
That being said, this car has been a good car for us. We knew when we bought it that with high miles it would need lots of TLC.
I will say I am surprised that even though we seemed to blow through pumps pretty quickly, the engine held up solid. In fact, I was willing to sell the car at 203k when the transmission quit, but my parents replaced it for me. I think they are hoping to keep the car after I buy one soon.
Amazingly, I haven't ever "tuned up" the engine. I've just changed the oil every 4k and once every 4 tanks of gas added Lucas gas treatment. Most service guys have told us "the 4.0L is a tank". I agree, even with 206k, it starts strong even in the winter.
I just wish I could get the AC to hold up. We now need to change the evaporator (cost is $800 - yikes!).
Also, look out for gas mileage, this car loves to guzzle gas. Still cushy seats with power and heated everything is great in the winter, and this car is awesome in snow and rain. I once drove an hour and a half through the snow to my parents house at 60mph with 4WD. The car feels very confident.
For an American late 90's car, this Jeep's not shabby.