Picked up my new 2014 Mazda3 5 door last week.  Exhaustive (and fruitless) aftermarket search for roof rack options led me back to MazdaUSA's website where I found the OEM rack as an accessory for sale for the 2014 Mazda3.  Ordered it yesterday from the dealer, picked it up today.  The part # is: 0000-8L-MO1B.  Cost was $261.00 +tax for the set of rails which attach to the fixed points under the plastic trim.  I literally installed them myself in the dealer service reception area before I paid for the package because I wanted to be sure they were an exact fit.  Here's the kick: the box was labeled for a CX7.  Will mount my bicycle carrier to the bars in the a.m.  The rack is rated for 100lbs. I believe.  Hope this helps.