Borders of Malaysia Borders of Malaysia The borders of Malaysia include land and maritime borders with Brunei, Indonesia and Thailand and shared maritime boundaries with China, Philippines, Singapore and Vietnam. Malaysia has a total land border length of 3,147.3 km. Malaysia's border with Brunei is 481.3 km in length. Except for its coastline with the South China Sea, Brunei is completely surrounded by Malaysia's state of Sarawak on the island of Borneo. Malaysia shares a land border with Indonesia on the island of Borneo. The Malaysian states of Sabah and Sarawak lie to the north of the border while the Indonesian provinces of
Brunei–Malaysia border Petronas Carigali Sdn Bhd and US-based Murphy Sabah Oil Co. Ltd for two areas, which Malaysia calls Block L and Block M, which lie exactly within the area claimed by Brunei as part of its continental shelf/EEZ. Later in March 2003, a Bruneian gunboat was sent to drive away a Murphy drilling ship in the area. The following month, the Malaysian navy sent several gunboats into the disputed area to block the arrival of a Total ship. After a tense stand-off involving a single patrol craft from Brunei, Total backed off and both sides stopped work in the disputed areas.