Toyota Motor is poised to become the world's largest carmaker, ousting General Motors of the US from the top spot, according to a new business plan to be released in December.

The plan is expected to state that Toyota aims to make more than 9.2m vehicles in the year to March 2007 - a figure that should allow it to surpass GM if the US carmaker continues to suffer from falling sales and is forced to cut production further. GM made 9.1m vehicles last year, and last week predicted a fall of about 20,000 units this year.