The Bavarian Class D XI engines were branch line (Lokalbahn) saturated steam locomotives built for service with the Royal Bavarian State Railways (Königlich Bayerische Staatsbahn).

The state railway procured 139 examples between 1895 and 1912; it was the most numerous Bavarian branch line locomotive.

[1][2] Three of these locomotives were also produced for the Palatinate Railway (Pfalzbahn) as the T 4.II, but these had different dimensions, including smaller driving and carrying wheels.

[2] This sole surviving example of the Bavarian D XI is cared for today by the Apian-Gymnasium at Ingolstadt.

[2] For the construction of the Murnau–Kohlgrub–Oberammergau Local Railway (LMKO), the South German Electric Local Railway Company (Aktien-Gesellschaft Süddeutsche elektrische Lokalbahnen) procured two locomotives from Krauss with serial numbers 3930 and 3931, which were delivered in August 1899.

When it was realised that the electrification of the route would not be completed in time for the 1900 Oberammergau Passion Play, further locomotives of the D XI class were procured in two batches (factory numbers 4129 to 4131 and 4260 to 4265).

[1][2][3] The remaining three locomotives went to Lokalbahn Aktien-Gesellschaft (LAG) in 1904 when they bought the Murnau–Oberammergau line.