Will after market parts for a 2007 - 2008 Mazda 3 fit on the 2009?

 

yes, everything is the same until the 2010, once you get to the new body style it won't though.

 

uh... negative.

i know this from personal experience. at the very least, the oxygen sensor from a 2007 wont even fit on a 2008... they went from a 4 wire to a 5 wire.

mazda is ******* me HARD on this right now, the OEM sensor wont come out of the exhaust manifold, (i installed a header, so i needed to put the OEM sensors in it) and Mazda refuses to cover it, even though it was either installed without anti seize, or was cross threaded at the factory.

the header's mounting points are not compatible with the 2008's either

lots of things are different... so pay attention to what you're buying!