Am picking this car up this week. 2004 Mazda6 s, 3.0L V6, Manual Trans. Car looks as new as a 10 year old car can. Drove amazing, cant wait to bring it home. The only thing I noticed test driving it, is that the car can be greatly improved with a short throw shift kit.

 

DirtyPlunger, welcome on board! We're happy to have you here. Great looking ride, I'm sure you gonna love it and have a lot of fun. Feel free to reach out if you ever needed anything.

 

there are a couple of Current Mazda Mechanics on the forum that work at Mazda. I don't think there are any certified Mazda parts people on the forum. Suggest if looking for parts, call Mazda and e-mail them a picture when in doubt.
I have a 2006 Mazda 6 which is similar to yours, but different.