China's BYD on Monday started offering advanced autonomous driving features on most of its models including ones priced as low as $9,555, far undercutting competitors such as Tesla in a move analysts say is set to start a new price war.

BYD unveiled a massive expansion of its "Gods Eye" intelligent driving system on Monday as the car giant looks to win the brutal EV battle.

And what is more, they are packaging it in electric cars that are already dramatically cheaper than anything from Tesla. Take the BYD Seagull, a car priced at just $9,500. The Chinese automaker, which has overtaken Tesla in sales there,