Welcome to genvibe
Looking at the 03 Matrix parts listing at
http://www.genvibe.com/images/misc/manu ... atalog.pdf
page 4 of 17 shows only one front rotor, so I assume its the same for AWD, FWD and GT (XRS) but it has the pads for AWD and GT(XRS) and a different one for FWD. When I look on a toyota parts site to see what vehicles those two different pad part numbers fit, I get the same list of vehicles, with no mention of AWD. SO I assume any pads for an 03 will fit
Page 13 of 17 shows the same rear brake drum for both FWD and AWD (GT/XRS has rear disc) but it shows different brake shoes for AWD and FWD. Similarly, a toyota parts site shows the same vehicle applicability for the two different shoe part numbers.
while the parts listing PDF seems to indicate differences between the FWD and AWD variants, toyota parts sites list both but says they all fit the same cars.
So, I think you don't need to worry about a FWD/AWD difference. None of the chain auto parts stores show a FWD/AWD difference n 03 Vibe brake rotors/drums/pads/shoes
Of course, a standard disclaimer, I'm some rando person on the internet, if you buy the parts and they don't fit, sorry, but no money back guarantee on the info above
