The contract, with an option to extend for an additional two years, is "substantially much larger in both volume and services than the previous contract", a T-Systems spokesman said. The deal is believed to be worth around €1.2bn (£850m).
For the past three years, T-Systems has provided DaimlerChrysler with a range of global services, including data centres, software development, systems maintenance and consulting.
Under the new deal, the German IT service provider will extend service to Japan's Mitsubishi Motors, a member of the DaimlerChrysler group, and will also provide several additional networks and IT services, which have yet to be announced.
T-Systems was formed by the merger of DaimlerChrysler's IT outsourcing unit, Debis Systemhaus, and the systems integration arm of Deutsche Telekom.
John Blau writes for IDG News Service