Chevrolet Optra is a Daewoo Nubira with the Chevrolet brand, mine is 2004, automatic fully loaded.
Problems that I have:
0 Kms. Never had Heat, the system worked properly but with a very little heat, dealer fixed saying the coolant mix was bad because in Korea they put straight coolant without water.
20,000 Need an Aligment, front tires where showing uneven
40,000 Kms. rear brakes disc brakes gone (Pads and Rotors) while the front ones had 60% of pads left.
59,000 Kms. The drivers door lock (where you insert the key) fall into the door and the door was permanet locked, I had to use the passanger side to go in and out the car.
62,000 Kms. Head gasked leaking coolant to outside of engine, took a week to the dealer to do the job, they said they had to remove the engine to make the job, plus the serpentine belt was all cracked and they had to replace it.
All This was covered by the warraty.

Hoping not to have any other surprise in the near future, noe I'm thinking in a Toyota.