I just purchased a Honda Accord 2011 EX-L. Before purchasing, I notice vibration in the wheel, when I was on the highway. I asked them to do a front end alignment. They informed me they remounted my front tires, and if I had any problem call them. I now noticed I felt an annoying vibration in the gas pedal. What do you think is causing this problem.

 

Well they said if you had any other issues, to call them. If that vibration wasnt there before, then they are obligated to atleast figure out why its there. Could be a number of issues. Tire balance, bent wheel, alignment issue, loose motor mount, loose suspension parts, ect. Something that would have to be physically diagnosed.

 

Whatever it is should be easily identified. I would start with tire wear and tire balance. If the tires are chopped up get new ones.
Given the track record of the Accord tires seem the only real culprit here.

 

Probably something simple like balance or tyres as lads have said above, but you may as well go back to them and get them to look at it seeing as it was caused by whatever they did to it..