The contract, worth approximately €80m, includes the modernisation and upgrading of the structure as well as the interior and exterior livery, and the replacement or retrofitting traction systems, auxiliary equipment, brakes, lighting and other equipment.

The 30km Medellín metro network, opened in 1995, is the only one in the country and consists of two lines and 27 stations. CAF has supplied 36 trains for the network since 2011.