A large number of cars was supplied to the GDR, the USSR, Romania and the former Yugoslavia using names T4D, T4SU, T4R and T4YU, respectively.

This was called "Großzug" ("big train") and most-commonly consisted of two motor cars and a trailer.

Despite still being in working order, the T4Ds were withdrawn from regular service in Dresden mostly due to accessibility concerns, as low floor vehicles are now mandated for all new purchases.

The T4D still sees service on lines to and from Dresden Technical University and during the Christmas market in order to deliver more frequency.

Since the vehicles were suitable, due to the smaller car body width, for most Romanian networks, they were used more frequently and differently from the T3.

Their introduction in Bucharest required a specially-built depot for them along with a new team of well-trained technicians to fix these trams.

The project progresses very slowly due to financial problems, and the number of trams to be produced is also uncertain, although they originally intended to convert all existing 130 T4 cars into 65 modernised vehicles.

The modernization project halted in 2011, and only a few are in service today, some of them being out of order due to the heavy shortage of parts (a common problem for the STB these days).

However, in the last years, lack of maintenance and care for the trams have hampered their performance and reliability, and only a handful of examples survive today, most of them having been cannibalized for spare parts, and the remaining ones undergoing refurbishment.

The two motor coaches delivered for the then Yugoslav, now Serbian, capital Belgrade used electrical equipment of the T4D.

Second largest Yugoslav city, today Croatian capital Zagreb, bought 95 vehicles between 1976 and 1982, 60 of them being still in use as of January 2012.