by this time most of the common bugs should have been scrubbed out, but the 04's had teething pains. If service records are available, good. Stuff like alternator to battery cable, stepper motor control reflash, and spark coils are things that should have been replaced.
See if you can find out when the timing belt was done(about 80k is good), and if they replaced the water pump, thermostat, rollers and tensioner while the patient was open. If they didn't do everything, get ready for a themostat.
Another problem area is the drive shaft center mount. If done already, good. If not get ready. Mine is still good at 70k miles, but I'm getting ready.
Open the hood and inspect the intake control rods and make sure they can be moved. They are upfront and you will see 2 vacuum contollers with plastic rods. The plastic rods break when the mechanism they are attached to gets jammed.