Tesla has upgraded the self-driving hardware on its Model Y electric vehicle sold in China to Hardware 4.0. HW 4.0 features improved cameras, sensors, and computing power to enable autonomous driving capabilities. The upgrade will be provided free of charge when customers purchase the Model Y in China. Tesla faces rising competition in China from automakers like BYD, Nio, and Xpeng, who are focusing on technology. The hardware upgrade allows Tesla to better compete on features like self-driving as sales pressure mounts.