If ur timing looks ok there is no need to replace it I'm at 100000 on my 05 aveo hatch took a look at the timing belt and it's still good. I'm planing to change it as soon as the weather turns for the better just to be on the safe side. The most important part to remember is that this is not a sports car but an econo and u should drive it as such don't hammer it and don't red line it. I had this car since I was 17 and I've gone through my "speed deamon" faze with this car and I've pushed it like theres no tomorrow and it ended up blowing my thermostat and head gasket. So I learned my lesson with that take it nice and easy. A couple areas I would suggest to check 1. Make sure the flex pipe is in very good condition I've had to replace mine twice and I've had the car since brand new. 2. Open the doors get on ur knees and check for rust or paint bubbling on the bottom of the inside of the door itself. 3. Roll ur windows down pull the weather stripping down and check for rust spots on the inside of the door on the top where the stripping pops in to. 4. Make sure the air box screws indeed unscrew and u are able to open it because I had that issue with the screws rusting in to the bobbins that are molded in to the bottom portion of the air box and thus causing them to spin. i.e. U can't open the airbox other than breaking those bobbins out. 5. Check to see if the heat sheeld on the exhaust manifold is not rusting especially the bottom bolt next to the sensor. It has the most heat transfer at that point and I replaced my heat sheeld about a year ago and this one is starting to faulter already too. That's about all the major problem areas that I've had good luck with ur new Aveo