It was introduced in 1995 to provide local rail services in Kuala Lumpur and the surrounding Klang Valley suburban areas.

This can be attributed to reduced service frequency due to the ongoing Klang Valley Double Tracking (KVDT) rehabilitation project.

KTM Komuter's 287 km (179 mi) network in the Central Sector mainly covers the Klang Valley.

Transfers between the two main lines can be made at any of the four stations on the central core: KL Sentral, Kuala Lumpur, Bank Negara and Putra.

The KTM KL Sentral-Terminal Skypark Line is a limited express service for passengers headed towards Subang Airport.

Firstly, the operator introduced a new queuing system, in which the lines are painted on the floor with three colour codes representing each of the train set.

The Gemas and Batang Melaka stops were removed starting 20 June 2016 with the train running between Seremban and Pulau Sebang/Tampin.

Subsequently, the shuttle service was terminated on 11 July 2016 when it was absorbed into the Batu Caves-Pulau Sebang Line.

[5] The first phase of the electric train service was planned to be from Sentul to Shah Alam via Kuala Lumpur.

[5] Despite being planned start operations in July 1995,[5][5] completion was delayed as of January 1995, causing the service to not launch on time.

Operations between Sentul and Shah Alam began on 28 August 1995, on what was the original Port Klang Line.

The Rawang-Tanjung Malim shuttle service was absorbed into the main Port Klang Line on 11 July 2016.

Northern Sector services were introduced on 11 September 2015 between Gurun in Kedah, Butterworth in Penang and Kamunting in Perak.

The Gemas and Batang Melaka stops were removed starting 20 June 2016 with the train running between Seremban and Pulau Sebang/Tampin.

Relevant station platforms were added and heightened to allow easier access to Komuter trains travelling in both directions.

Smaller, wood-based stations and halts along the line that were built at around the same time were either demolished and replaced by modern brick-and-concrete counterparts, or simply abandoned.

The only exception to the rule is the old Sentul station, which has remained in service years since KTM Komuter's launch, albeit with a replacement platform.

Taller, wider canopies were erected on the platforms of most stations to replace narrower, original versions in 2006 and 2007.

The Kuala Lumpur Sentral station, however, is housed under the concrete base of the transport hub, and is stark and utilitarian in design.

The original Komuter rolling stock consists of three versions of three-car EMUs added over the course of three years, beginning in 1994.

A handful of them remain, usually on the Kl Sentral-Terminal Skypark Line or Sentul-Batu Caves shuttle, but many have been reallocated to the northern sector.