My wife's 05 WRX has 150k and has has had this stuff replaced:
Timing and accessory belts
PS pump
Alternator tension pulley
Radiator
Motor and tranny mounts
Battery
Plugs several times
Clutch
Some O-ring in the AC system replaced
Diff fluids changed
Oil
Air filter
Head/fog light bulbs
Metal coolant reservoir on top of the engine. They all rust and break, replaced with a plastic one like newer Subarus.
The only thing wrong with the car is a grinding noise in the tranny when you lift off of the accelerator and leave in gear without pushing in the clutch. ZB says eventually the tranny will die, but when it does we may get rid of the car. If it lives another year, it may be gone then too. It's been a pretty good car. But the wife is ready for a new car, she may go with us to Detroit for the NAIAS.