The partnership between Toyota and Tesla has finally wound to an end. 。

The Japanese car marker on Saturday announced that it had sold the last of its stake in Tesla, as it prepares to launch its own purely electric car. 。

SEE ALSO:Elon Musk promises smoother new autopilot for Tesla cars  。

According to former engineers, a culture clash had emerged between the two companies, with Toyota's conservative "safety first" style of engineering going up against Tesla's risk-taking approach.。

Toyota had bought about 3 percent of Tesla for $50 million in 2010. 。

The Japanese company had said, at the time, that it was impressed by "Tesla's start-up culture", with Tesla CEO, Elon Musk, calling the partnership "historic". 。

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The companies went on to jointly develop the RAV4 electric vehicle, of which some 2,500 were sold.。

But the gap between the two companies ultimately proved too wide to bridge. 。

"Incredibly dumb." 。

In 2014, Toyota sold part of its stake in Tesla. 。

Toyota formed its own unit to develop electric cars in November 2016, investing heavily in hydrogen fuel cells -- a technology which Elon Musk has called "incredibly dumb."。

Toyota's long-range electric vehicles are expected to launch around 2020. 。

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The Japanese company has been a pioneer in developing hybrid engines, with the introduction of the hybrid gasoline-electric Prius in 1997.。

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