Fiat will continue as title sponsor of Yamaha's factory MotoGP team for the next two seasons.
Fiat replaced Camel as title sponsor in 2007 and, after a difficult debut season, Fiat's colours were carried to riders' world championship glory with Valentino Rossi in 2008 - when Fiat Yamaha also clinched the teams' title and Yamaha the constructors' crown.
"We are delighted to be continuing our partnership with Fiat for a further two years," said Lin Jarvis, managing director of Yamaha Motor Racing Sr. "It remains a very interesting mix for an Italian car manufacturer to be partner of a Japanese motorcycle manufacturer in the world's premier motorcycle racing series.
"After a tough first season in 2007 we were really happy to win the triple crown titles this year for Yamaha and for Fiat.
"Fiat's decision to continue for a further two years is a sign of confidence in our activities and a strong confirmation of the value of being involved in the MotoGP championship. Our target for the future is clear: we want to continue with our winning ways and provide even more excitement for the fans of the Fiat Yamaha Team."
Rossi and 2008 rookie of the year Jorge Lorenzo will continue to form the Fiat Yamaha Team's rider line-up in 2009.
"We are pleased that we are able to continue with this successful partnership for the next two seasons," said Lorenzo Sistino, managing director of Fiat Automobiles. "Our Yamaha sponsorship is an asset in our Brand strategy that brings us ever closer to young people and ensures we are fully in tune with their interests and passions."