Wheel Rim Problems of Toyota Matrix

I have a 2005 Toyota Matrix xr with 16" alloy wheels. I hit a cobblestone sized rock in the rock with the left rear wheel at about 50 mph. The tire lost pressure because the alloy wheel split in half like a bagel sliced down the middle. Toyota would not fix this as a warranty item indicating there was no evidence of a manufacturing defect. However, none of the service personnel had ever seen a wheel split in half. I've contacted Toyota's customer experience center and reported the incident but they also indicate this is not a warranty issue and referred me to the dealer customer relations manager who gives the same explanation. I believe there may be a defect in these alloy wheels but have found no other reports of such damage on the NHTSA site. I want to make sure this incident is documented in case these wheels are found to be defective.

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Front wheels vibrate at highway speed, if snow slush freezes in low profile steel wheel rims. This happened twice this winter to me, I first thought a wheel weight came off the shake was so bad, the dealership checked it out an said it was ice inside the back of the wheel rim, he melted it out an it was find. It happened again latter on in the winter you only feel the shaking if you bring the car up to highway speed,I have never had this problem with wheel rims before an I live in upstate n. Y. Where we get enough snow. When the ice melts or breaks out of the back of these deep dish rims the wheels stop shaking, I consider this a dangerous problem that should be addressed be fore some one gets into an accident because of it. The vehicle is a 2004 Toyota 4wd Matrix.

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