The MAZ-203 is a fully low-floor single-decker bus.

It is a representative of second generation of MAZ city buses, being a successor of MAZ-103.

MAZ 203 can be found in Poland, Ukraine, Russia and Romania.

In Serbia, MAZ has been working in cooperation with local-based company BIK (Bus industries Kragujevac) for the manufacture of BIK-203, a bus manufactured on the basis of the platform of MAZ-203.

[1] There is also a trolleybus variant of the MAZ-203 built from 2008, MAZ-ETON T203 with electrical equipment of Eton, Belarus (GTO or IGBT).