Toyota is to hold a press conference at 0800 GMT on Wednesday amid rumours that it is to quit Formula 1.
From: news.bbc.co.uk
Toyota has not won a grand prix since making its F1 debut in 2002 and finished fifth in the constructor championship this season.
Long-term Toyota driver Jarno Trulli was second in last month's Japanese Grand Prix, equalling the team's best finish to a race, which they achieved on four other occasions.
Japanese driver Kamui Kobayashi joined Trulli for the final two races of the season after regular driver Timo Glock was injured.
Germany's Ralf Schumacher, France's Olivier Panis and Britain's Allan McNish have also all driven for Toyota over the years.