Bondholder Bombardier has been awarded a contract worth £112.1 million, to supply new motors and traction control equipment for London Underground's fleet of Central line trains.
The train maker will provide parts for 85 eight-car Central line trains.
Richard Hunter, Managing Director of Bombardier Transportation UK, said: "This important contract win is testament to the significant improvements in energy consumption, reliability and performance of our Bombardier MITRAC systems.
"Bombardier has a long history of working with London Underground, and we continue to provide cutting-edge technology across the tube network, playing a vital role in keeping London moving."
Mark Wild, Managing DIrector of London Underground, added: "Installing new motors is one of the most important parts of this work, and will mean we can deliver a more reliable service to our customers, which in turn will boost capacity."