An extension of the Toyota deal was signed earlier this year but it was mutually agreed to terminate the deal.
Renault and Cosworth are considered the most likely contenders to supply Williams in 2010.
Williams had used Toyota engines since 2007 but never won a race with them. Team principal Sir Frank Williams said he appreciated Toyota stepping in at a time of "great difficulty" after a series of reliability failures when using Cosworth engines in 2006.
Posted on: 2009-10-14 08:27