AREX Class 2000

The AREX Class 2000 is an electric multiple unit of the Airport Railroad operated by the Incheon International Airport Railroad on the AREX service. It is used to make the slower local journeys and hence has a more metro like layout with 4 doors per side and longitudinal seating, in contrast to the express layout the 1000s have.
On September 15, 2025, the first of nine additional 2000 series trains began revenue service on the all-stop service. The trains feature an upgraded exterior and a top operating speed of. Two more sets are expected to enter service by October 17 with the remaining six entering service by the end of the year.