The Class 341000 trains used an ivory-colored interior with a long sheet prior to their overhauls.

The Class 341000 trains are stored at the Siheung depot, which is located after Oido Station on Line 4.

Trains 341-01~341-22 were manufactured from 1993 to 1994 by Daewoo Heavy Industries, Hanjin Heavy Industries, and Hyundai Precision to address the opening of the Gwacheon Line and the Ansan Line (from Seonbawi Station to Ansan Station) and were originally six cars long.

Meanwhile, trains 341-23~341-25 were manufactured in 1996 by Daewoo Heavy Industries to expand the rolling stock on Line 4; they were built with 10 cars each.

[1] The second generation of Class 341000 trains were built in 1999 by KOROS (Korea Rolling Stock Company) to address the extension of the Ansan Line section of Line 4 from Ansan Station to Oido Station.

The cab ends of the driving cars changed completely into a circular front view, which led to the trains being nicknamed "round face" (동글이).

Until 2024, sets 341-41, 341-44~341-45, 341-48~341-55 temporarily operated in Line 1 due to the early retirement of the first-generation of Class 311000 trains.

[citation needed] The final 5 sets, numbered 341-56~341-60, were delivered in 2024 to replace the second generation Class 341000 trains.

The Daegu subway fire compelled Korail to introduce flame-resistant interiors for passenger safety.

In 2011, the Class 341000 trains were renumbered from the 2000-series to the 341000-series as a part of a new numbering scheme by Korail (the leading "3" indicating a metro car).