KTMB purchased a total of 5 sets worth RM 240 million from a joint venture between South Korea's Rotem Co. and Japan Mitsubishi Electric Corp in 2008.

[2] All five train sets were designed by the Marubeni Corporation and were built by Hyundai Rotem of Korea and Mitsubishi Electric of Japan.

[5] In 2010–2012, 2 sets of KTM class 91 were being used for normal commuter use due to a shortage of trains.

While in commuter use, long distance facilities such as toilets and cafes were closed and locked.

Train schedule is categorically separated into a number of fixed classes with different ticketing structure afforded to travelling at particular times.

LCD Displays within coach show feature films, with sound muted but with subtitled English.