BYD unveiled a fuel-saving upgrade to its DM 5.0 hybrid platform amid soft July deliveries and falling PHEV sales. The OTA update boosts fuel efficiency by 10%. July sales dipped to 3,41,000 units, with PHEVs down 22.6% YoY. EV rivals like Li Auto, Nio, and XPeng also saw mixed results as price wars and new launches reshape the market.