London - BMW sold their F1 team back to founder Peter Sauber on Friday after cancelling a planned takeover by Swiss-based mystery buyers Qadbak Investments.
"Yesterday, BMW AG reached an agreement with Peter Sauber regarding the sale of the BMW-Sauber F1 team," BMW said in a statement.
"The contract is subject to the condition that the team has a starting place for the 2010 Formula One season."
BMW said the agreement meant "the sale to Qadbak Investment Ltd that was initially planned will not be completed."
It added that a further agreement with Sauber would cut the workforce at the Hinwil factory from 388 people to around 250, with redundancy notices issued on Friday.
The Munich carmaker, who won just one race in their time as BMW-Sauber, warned that further job losses could follow but said it would support the restructuring.
Qadbak concern
BMW, who bought an 80% stake in the Swiss-based Sauber team in 2005, announced in July they were pulling out of F1.
In September, they agreed a deal to sell the team to Qadbak, who were described as representing unnamed Middle Eastern interests.
Qadbak had also bought fourth division Notts County, England's oldest football league club, through their Munto Finance Company.
BMW-Sauber have lost their place on the 2010 starting grid to Malaysian-backed newcomers Lotus F1 but were thrown a lifeline by Japanese car giant Toyota's decision this month to also leave the sport.
However, the governing FIA has yet to confirm the team as the 13th entry, amid concerns about finances and individuals linked to the proposed Qadbak takeover.
An FIA spokesman had no comment on the situation but the official entry list is due to be published by Monday, according to the published 2010 F1 sporting regulations.
"We are very happy with this solution," BMW management board member Klaus Draeger said of a deal that might have been done months ago, had the carmaker not rejected Sauber's bid for the team in August.
"This fulfils the most important requirement for a successful future for the team. Our relationship with Peter Sauber has always been excellent and marked by absolute respect," he added.
Sauber, who first entered F1 with his team in 1993 and had retained a 20% stake after the 2005 takeover, said he was relieved.
"It means we can keep the Hinwil location and the majority of workplaces," he said.
"I am convinced that the new team has a very good future in Formula One, whose current transformation with new framework conditions will benefit the private teams.
"Our staff here are highly competent and motivated, and I look forward to taking on this new challenge together with them," added the cigar-smoking 66-year-old, who had intended to enjoy his retirement after BMW took over.
The team, who were led by Mario Theissen last season, have yet to name any drivers for 2010 while sponsorship deals have also been put on hold due to uncertainty about the future.