Does the 2003 accord ex v6 use the same automatic transmission as an 2005 accord ex v6?

The engines and transmissions did not change between those years, so I would give you a cautious "yes." As always with transmission change-outs, be careful that all intakes and outtakes are the same on the engines, and that the transmission you have found to replace your old one has not been modified. Best of luck! CarGrrl

I agree with CarGrrl. I would be very cautious in this case since some minor things do change from year to year. However, I do believe that the 2005 model transmission should work just fine for your application.

Are the engines from 03-07v6 the same