From first scheduled departure, Wednesday, 1 November - until further notice
(modified at 2023.10.30. 09:51)
At Népliget, trolleybus line 83 to Fővám tér M serves the stop of night services 901 and 918 running to Kelenföld vasútállomás M, on Könyves Kálmán körút, instead of Üllői út.