The M4 station was opened on 1 March 2000 as part of the inaugural section of the line from Gara de Nord to 1 Mai.

[1] It is very unusual mainly due to its story: Initially designed as a bilevel station, the layout of it was heavily changed, leading into a one-year delay until its opening (this involved abandoning its bilevel plan and inserting a tight turn going towards Piața Victoriei).

Owing to this current configuration, passengers have to exit the system and enter again, despite there being a sort of connection tunnel between the stations.

A widely circulated urban story tells how supposedly the upper deck of one of the bilevel tunnels served as a siding, where trains could be left overnight in case there was no capacity in other places.

The story further claims that the set was eventually found in working order after 1989, but since it could not be removed, it was left there and thieves, years later, broke into the tunnels and dismantled parts from the unit.