Absolutely Nothing.
The car has proven itself to be very reliable it has never let me down. The engine has proven itself to be exellent as it never burn't a drop of oil and requires very little maintanence due to it having a cam chain. The interior is a little dated, but hey it 12 years old so what do you expect. I would highly recommend one of these cars to anyone who is looking for a cheap and ultra reliable runaround that requires little or no maintanence. it's not too bad on fuel either around 35-40mpg depending on what kind of driving you do. all in all it's a super little car that will go on and on forever due to Nissan's exellent build quaility.
Dead right I bought one there two weeks ago from a relative. 107K miles on the clock and it runs like new! any maintenance needing to do you can do yourself because its such a simple engine! powerful and nippy too! GREAT CAR! And parts are really cheap due to the high volume they were produced in!