One problem related to tire sidewall has been reported for the 2008 Mazda MAZDA3. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Mazda MAZDA3 based on all problems reported for the 2008 MAZDA3.
In early August 2009 at approx. 21k miles when I performed my 7500 mile tire rotation I noticed that all the 4 oe good year rsa tires were very worn on the inside, not the thread area but the area where the sidewall starts. I had noticed this before but had not thought much of it as it wasn't too bad. I drove on a 500 mile trip shortly after this and became more concerned . I had the alignment checked at the destination and it was within mfg. Spec. The alignment people said the cause was probably due to the negative camber on the rear wheels which at -2. 3 and -1. 7 was probably the reason for the wear and that I should replace the tires. Mazda does not provide for adjusting the rear camber. Not having the resources at the time, thinking maybe it was a overzealous sales effort, and to me the tires still looked usable I didn't replace them. Now at 27k miles I have the resources to replace them and the area on the inside corner in much more worn. Mazda gives no explanation, one said should rotate @ 5k miles, another says they put crappy tires on the vehicle. On the internet, people who replace the tires say they continue to have the problem and that it is caused by the excessive negative camber that cannot be adjusted. This is a safety issue in that, with a sour economy many people may not be able to afford replacement tires, many people may not be able to or pay to rotate tires and many people may not check them at all. At the minimum Mazda should provide for adjustment of the rear camber.