The U9 is the second vehicle from the Yangwang brand after the U8 off-road SUV, and was formally introduced on Auto Shanghai in April 2023.

[3] The U9 achieved an uncertified Nürburgring Nordschleife lap time of 7 minutes and 17.9 seconds in November 2024.

It also achieved a straight-line top speed of 391.94 km/h (243.54 mph), making it the fastest Chinese car in serial production.

[4] The U9 is equipped with four electric motors providing a total power output of 960 kW (1,290 hp) and a maximum range of 450 km (280 mi) on the China Light-Duty Vehicle Test Cycle (CLTC).

Like the U8, the U9 features BYD's proprietary "e4" (易四方) individual wheel drive system, which enables the vehicle to redistribute torque among the four wheels in case of traction loss or a tyre puncture at speed; and the "DiSus" (云辇) active suspension system, which allows the wheels' ground clearance to be readjusted individually and even to perform a brief vertical jump.