2006 Toyota Matrix: Rear wheels out of alignment, resulting in excessive, irregular wear on tires. Ruined after only 24,000 miles. Toyota technical representative informed me that the non-adjustable rear axle is "self aligning". if so, my tires would not have been ruined. Other alignment specialists confirmed problem with Toyota corolla frame. This could lead to tire blow-out and accidents. Should be investigated.

- Columbus, OH, USA

My 2006 Toyota Matrix has developed extreme cupping of the tires at 21, 000 miles despite regular rotations at 5,000, 10,186, and 14,722 miles. I had begun to notice a change in the sound of the tires at 21,500 miles. My mechanic refused to rotate the tires at 21,981 miles saying something was wrong with the struts thus causing extreme wear on the tires. I went to the las cruces Toyota in New Mexico where I purchased the car but they said nothing was wrong and refused to replace struts or provide new tires. Many complaints about this problem related to the Toyota Matrix has been posted on the consumer review site for edmunds.com. Toyota refuses to address the problem.

- Las Cruces, NM, USA

I have about 15500 miles on a 2006 Toyota Matrix that has abnormal tire wear. The head service mechanic explained to me that my car had to light of a rear end and that the tires bounce around and create abnormal wear. He stated that it would only make it worse to rotate them to the front. I have vibration and two ruined tires. Toyota answers that it is a tire issue and to take it up with the manufacturer. The manufacturer states they are not responsible for tire wear. Every tire installer and mechanic know about the flaw in these cars but Toyota does not take responsibility for this design error.

- Dexter, MO, USA