Happily acquired the 323 GT-R for FH5 as I used to have a 1990 323 BG 1,6 GLX Sedan in metallic current blue (light blue metallic colour). 323 Sedan would be cool addition if possible
Before that, had also a pre-facelift 1982 Mazda 323 BD 1,3 3-door Hatchback in metallic light green colour. It was my first car. Perhaps 323 BD 1,5 GT would be suitable version for Forza Horizon 5.
My car in the pic below had some aftermarket extras like air deflectors at the hatch and door side protectors. On the other hand, rear wheel center cups and rear splash guards are missing.