The Class 81 is the first and oldest type of electric multiple unit introduced by Keretapi Tanah Melayu for its KTM Komuter service.

They operate in multiple-unit formation, The EMUs were state-of-the-art, with remote-controlled pneumatic doors, Automatic Train Protection (ATP), train data recorder, wheel-slip control, GTO/IGBT traction electronics and regenerative braking, and ran from 25 kV 50 Hz AC overhead catenary supply.

Up to the point of their introduction no other KTM motive power used these modern train control systems.

The cessation of Jenbacher’s rail operations resulted in loss of spare parts for these trains.

The hybrid service started in 2009 and ended in 2012, when new trains rendered this stopgap measure unnecessary.