The Type DT4 is a four-car electric multiple unit (EMU) train type operated by the Hamburger Hochbahn AG on the Hamburg U-Bahn system since 1988.

[2] Widescreen passenger information displays are to be fitted to the whole DT4 fleet, with works scheduled to be completed in 2022.

[3] The trains have steel car bodies and a three-phase propulsion system.

The powered bogies are equipped with water cooled three-phase asynchronous motors.

[citation needed] Passenger service began on October 17 of the same year.