Williams will switch to a new engine supplier in 2010 after confirming its relationship with Toyota will end at the end of the current season.
As has been expected for several months, the Grove-based team has decided to seek an alternative supply of V8 units for next year having switched to Toyota power from Cosworth in 2007.
Team owner Sir Frank Williams thanked Toyota for its supply of engines and the support it has given the team over the past three years.
“At a time of great difficulty for us as a team, Toyota stepped forward and agreed to supply us with engines for 2007 through to the end of 2009,” Williams said in a statement.
“Toyota has been a very decent partner who have always respected our independence and provided us with a
third first-rate technical product.
“We are proud that we have been able to work with such a great company and we are grateful to the team in Cologne for their support.
“I would like to single out for our thanks the Toyota engineers and technicians who have worked within our race team tirelessly for the past three years.”
Toyota later issued a separate statement confirming the split, with the Cologne-based team revealing that both parties had agreed a contract extension taking them in 2010 earlier this year but that now had agreed to terminate the agreement by mutual consent. "We have enjoyed a productive working relationship with Williams and I believe both companies have benefited from that partnership," said Toyota Motorsport chairman Tadashi Yamashina.
"We respect the wishes of Williams to look for other opportunities and wish them well for the future."
Williams added that it will confirm its new supplier for next season in due course, with the team having heavily linked to a supply of Renault V8s and more recently to a reunion with Cosworth. The French marque was Williams’ engine partner from 1989 to 1997, and Cosworth was the team’s enginge supplier for the 2006 season.
Surely the absence of Toyota from the team’s supply roster will mean the end for Kazuki Nakajima, who has proved decidedly second-rate this season?