The limited-slip Borg-Warner differential was noisy & leaked when I bought the car. be warned, to rebuild it properly with new seals, gears (to overcome noise) bearings & LSD cones/springs will set you back about $1,600...
The lifters are quite noisy when the engine is cold.
Shock absorbers, springs & urethane bushes make a very good difference to the way the car drives.
If the voltage regulator or alternator are faulty, there are 4 completely unrelated lights on the dashboard that light briefly, you may also hear a slight buzzing noise from the passenger foot well at the same time.
Spark plugs are an absolute pain to change. All of the piping between the inlet manifold has to come off, and you have to have a lot of patience unscrewing them 1/16 of a turn at a time.
Fuel injectors start to clog after about 190000kms. If it isn't done, some cylinders run lean, giving pre-ignition problems, destroying pistons. While the top of the manifold is off, it's a very good idea to change the spark plugs. Makes it relatively easy to perform, and once the car is back together again & tuned, quite often gives within 1 Kw of the manufacturers specs, and gives you back the mid-range torque that you probably didn't notice was missing...
The auto transmission doesn't handle abuse very well, it develops a bad vibration under acceleration when hot.
The little rubber bush off the bottom of the gear selector perishes & drops off, leaving a sloppy selector.
The door & boot seals leak from time to time, normally in heavy rain. This can cause a little bit of rust in the sides of the boot floor if it isn't looked into.
The wheel trims on this model rattle over rough roads.
Tyre choice is important. They have a reputation for being a bit tail happy on wet roads, which is accentuated when worn, cheap or retread tyres are used.
This car may sound like a bomb, but I'm very thorough and considering that it gets used (and abused) every day as a delivery vehicle, it has held up very well.