The BRT Sunway Line is a bus rapid transit (BRT) line that is part of the Klang Valley Integrated Transit System servicing the southeastern suburbs of Petaling Jaya, Malaysia. It is the world's first all-electric Bus Rapid Transit system.

The Klang Valley Integrated Transit System is an integrated transport network that primarily serves the area of Klang Valley and Greater Kuala Lumpur. The system commenced operations in August 1995 with the introduction of commuter rail service on the existing rail between Kuala Lumpur and Rawang. The system have since expanded and currently consists of 11 fully operating rail lines in a radial formation; two commuter rail lines, six rapid transit lines, one bus rapid transit line and two airport rail links to the Kuala Lumpur International Airport's (KLIA) Terminal 1 and Terminal 2, and one temperarily suspended airport rail link to the Sultan Abdul Aziz Shah Airport. The system encompasses 528.4 kilometres (328.3 mi) of grade-separated route on standard gauge and metre gauge with 197 operational stations.