Bavarian A IV engines were German 2-2-2 steam locomotives with the Royal Bavarian State Railways (Königlich Bayerische Staatsbahn).
The vehicles were developed for night journeys and operations on the North-South Railway.
In addition, the weight and the boiler overpressure were raised.
This class was used widely, especially in south Germany and in Austria.
The survivor was initially converted to a 0-6-0, and later a 0-4-2 wheel arrangement.