vibration 2002 corolla

[dot88]

I have a vibration in my corolla at all speeds but more noticeable at 50mph and above. Took to a Toyota dealer and was told it was a tire problem.Also said I needed alignment which I had done. Purchased four new tires from separate tire dealer and car still has the same vibration. Going back to dealer this week. What could be causing this problem? Are there problems with the 2002 corolla?

[fishexpo101]

Vibration could come from a number of sources. Need a bit more information.

Vibration noticeable in the steering wheel or the whole car?
Who mounted and balanced the tires?
Do you know the specific machine they used to balance the tires?
How much weight did they put on each wheel in total (weight is stamped on the wheel weights themselves)?
Did they check for runout on the wheel (check for bent wheels)?
Did they check for runout on the hub (check for a bent or distorted hub)?
Have you tried to rotate the tires back to front and see if the vibration changes?