Between recalls and tsunamis, Toyota (TM 1.07%) has had its shares of troubles in recent years. But lately, the Japanese giant has seemed to be on a roll. One exception: China, where sales have been down even as the market has been up.

That trend may finally be changing, though. In this video, Fool.com contributor John Rosevear looks at Toyota's latest sales trends in China – and explains why they're critical to Toyota's drive to remain the world's largest automaker.