One problem related to transmission failure has been reported for the 2007 Mazda MAZDA3. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Mazda MAZDA3 based on all problems reported for the 2007 MAZDA3.
Transmission failure. Service bulletin #05-010/10 issued 8/6/2010. I took it in to have the same symptoms that is stated in the bulletin and they said the fluid was a little low so they put a quart in today. When I was driving home the transmission blew up. Please check the forums there is a lot of good information on those sites. The only problem is the the information disappears quickly. I don't know why?.