On November 6, BYD's Yangwang brand announced that the U9 Xtreme (U9X) recorded a top speed of 503.17 km/h on November 1 on the E11 public road in Abu Dhabi, breaking its own record for a production car. The result received two Guinness World Records certifications — fastest production car over a single direction and fastest electric production car — and recognition from the FIA.
The test took place on the Sheikh Khalifa Bin Zayed International Road in the Al Dhafra region, with 10 km of road closed and a longest straight of 7 km. Two runs on October 31 peaked at 490 km/h; the engineering team then adjusted battery and motor starting temperatures, rear wing angle of attack, suspension rebound damping and tire pressure, and the second run on November 1 reached 503.17 km/h. The driver was Marc Basseng, who had carried out the model's previous record attempt at Papenburg in Germany.
The powertrain uses four Yi Si Fang motors, each rated to 30,000 rpm and 755 hp (555 kW), for a combined 3,019 hp and a power-to-weight ratio of 1,217 hp per tonne. The car runs a full 1200V high-voltage platform, a battery capable of 30C discharge, and track-grade semi-slick tires co-developed with Giti.
The additive manufacturing element is the body. At EuroCarBody in October 2025, BYD displayed what it describes as the world's first single-piece 3D printed U9X high-performance body, which took first place in the professional jury scoring. The body was produced by Chinese metal AM company Bright Laser Technologies (BLT) using BLT-S1000 (12-laser), BLT-S615 and BLT-S815 systems, printed in one piece from high-strength aluminum alloy via laser powder bed fusion.
Confirmed figures include: through topology optimization with cavities and ribs working together, torsional stiffness at equal mass exceeds a solid structure by more than 200%; weight is reduced by more than 30% compared with conventional manufacturing; and dimensional deviation across more than 90% of the printed blank area is held within ±0.5 mm.
Beyond the body, BLT delivered 20 sets of 3D printed brake calipers for the project. Oil passages and inserts are printed in one piece; topology optimization cuts weight by 20%–30%; density exceeds 99.5%; and the parts have been validated at the Nürburgring.
Two dates should be kept apart: the single-piece printed body was shown publicly at EuroCarBody in October 2025, while this round concerns the November 1 speed record. They involve the same vehicle and the same body design, but they are not the same event. Per public information, the precise certification criteria for production-car speed records rest with Guinness and the FIA.