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 opened a new front in China’s electric vehicle price war — adding advanced driver-assistance features across most of its lineup for no extra cost and sending its shares to a record.

BYD plans to offer an autopilot system in nearly all its cars, making autonomous driving affordable to all mainland Chinese customers as the world's largest electric-vehicle (EV) maker seeks a competitive edge in an escalating price war.

Hong Kong-listed BYD (HK: 1211) shares rose to a record high of HK$345 on Tuesday, but pared some gains later to trade 0.7% higher at HK$332.4 as of 04:27 GMT. Shenzen-listed shares reached their highest level since July 2022, and were currently 0.2% higher at 330.87 yuan.