after working on these jeep Cherokee's for 3 years during my career with Chrysler I can honestly say that these vehicles come riddled with issues, its only a matter of time before these issues pop up one after another after another after another after another.
-Flex pipe's (Breaks)
-Oil cooler (Leaks oil)
-Injectors (stop working, usually cylinder 3)
-Vent temperature sensors (Malfunction)
-Wheel Bearings (Wear out)
-Brake rotors (normal rusty rot)
-Lower front ball joints (Pre-mature wear on early production models)
-Radio Faults (Software issues)
-Lights and Messages on the dash like you've never seen before
-Rear shock absorbers (blow out)
-RDM (Rear drive modules fail and set fault codes)
-Buttons in the steering wheel go dead

I'm sure i'm missing 50 more things that go bad on these but you get the point.