One problem related to radiator has been reported for the 2008 Saturn Aura. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Saturn Aura based on all problems reported for the 2008 Aura.
While driving home from work, my temp gauge shot up just beyond the 3/4 mark into the red zone. I pulled over and waited for about 14 minutes till the gauge came down to just under 1/2. I began to move the vehicle again and the gauge kept jumping up and down till I got home. I looked under the hood and noticed that the radiator fluid reservoir was about empty. I added radiator fluid and left the car parked till the next day. Drove the car around for almost 29 days when it began to overheat again. Once again when I looked under the hood, the reservoir was about empty again. I look up the problem on the internet and have found that a lot of gm owners with vehicles that have the 3. 5l or 3. 9l engines have been experiencing the same problem but gm will not fix the issue (gasket leak at the side of the block). According to what I have read, this is a known issue with these engines but gm has not done a thing to correct the problems.