The Yangwang U9 Xtreme, produced by BYD, has become the first road‑legal serial production car to exceed 500 km/h. On 1 November 2024 the vehicle was tested on the Sheikh Khalifa bin Zayed E11 highway in Abu Dhabi. During an earlier attempt the car collided with a barrier at very high speed, but a subsequent run achieved a top speed of 503.17 km/h, according to BYD’s announcement. The record follows the 2023 achievement of the Yangwang U9, which surpassed the Bugatti Chiron Super Sport’s previous world record of 490 km/h by reaching 496 km/h. The U9 Xtreme is powered by a 3,019‑horsepower engine and is certified for road use. BYD’s statement confirms that the 503.17 km/h speed was reached under controlled conditions on a public road, making the U9 Xtreme the first serial production vehicle to legally surpass the 500‑km/h threshold.