BYD reveals 4 nm Xuanji A3 chip and promises to pay for driver assistance crashes

BYD is no longer selling only batteries and cheap electric cars

BYD built much of its success on batteries, electric drivetrains and price. Blade Battery, DM i plug in hybrids and aggressive production scale turned the company into a heavyweight of the Chinese electric car market. Now BYD is adding the brain of the driver assistance system to the same logic of vertical integration.

Xuanji A3 is not just another control unit. BYD calls it China’s first self developed 4 nm automotive grade vehicle control chip. The company says it supports L3 and L4 autonomous driving functions, while a three chip configuration gives a car more than 2100 TOPS of computing power. TOPS means trillion operations per second and describes the raw power of an AI chip.

On paper, that already puts BYD close to Nvidia territory. Nvidia DRIVE AGX Thor promises more than 1000 INT8 TOPS and supports scalable architecture from L2+ systems to fully autonomous driving. BYD answers with its own chip, which it can tie directly to God’s Eye software, sensor hardware and the car’s electrical architecture.

Xuanji A3 gives BYD control of the whole chain

The Xuanji A3 uses a 16 core CPU, 273 GB per second of memory bandwidth, 420,000 DMIPS of processing capability and ASIL D functional safety certification. ASIL D is the car industry’s strictest safety level for electronic systems that control critical functions.

The more important point is not one single figure, but BYD’s control over hardware and software. The company says Xuanji A3 works with its own algorithms in a way that doubles computing efficiency. BYD also claims 20 percent lower energy use per TOPS than comparable products. In an electric car, that matters, because the driver assistance computer must not quietly eat into range or demand expensive cooling.

BYD also stresses its long background in semiconductors. According to the EV source, the company developed its chip business over 24 years, offers more than 2000 chip products and supports semiconductor development with more than 7000 employees. That separates BYD from car makers that buy their central driver assistance computer from Nvidia, Qualcomm or another supplier.

God’s Eye becomes a mass market product, not a luxury extra

BYD links the Xuanji A3 chip to the next stage of its God’s Eye driver assistance system. According to the official announcement, the whole BYD model range can now be ordered with the God’s Eye B LiDAR version. The EV source adds that in China this LiDAR based urban driver assistance system costs 12,000 yuan (about 1,520 euros), based on the European Central Bank rate of 29 May 2026.

BYD is pushing LiDAR and Urban NOA into mass market models, not keeping them only for expensive flagships. In China, that puts direct pressure on Tesla, XPeng, Nio, Li Auto and brands using Huawei’s ecosystem. According to CnEVPost, Nio, XPeng and Li Auto are also developing their own chips, including Nio’s 5 nm Shenji NX9031, XPeng’s Turing AI and Li Auto’s Mach M100.

Europe is a different story. A chip, LiDAR and a strong marketing name are not enough here, because higher level automated driving must pass type approval, safety, cyber security and liability checks. Changes to the UNECE regulation for automated lane keeping allow automated driving up to 130 km/h under certain conditions, but that is not the same as an L4 system operating freely in city traffic.

Full Damage Coverage is BYD’s boldest move

Xuanji A3 is the technology story. Full Damage Coverage is the business model story. In China, BYD promises to cover the entire financial loss if a legally responsible accident happens while the user is operating Urban NOA correctly. The guarantee lasts for one year and applies to new buyers as well as existing owners who update to God’s Eye 5.0.

BYD presents this as a confidence guarantee, not ordinary insurance. According to the EV source, the company calls it a free commitment with no payout cap, and says it should not affect the owner’s future insurance premiums. For a car maker, that is unusually forceful language. Until now, the driver assistance industry mostly left responsibility with the driver.

The wording still matters. BYD is not freeing the driver from responsibility in every situation. The guarantee depends on whether the driver used Urban NOA according to the rules and whether the incident meets BYD’s conditions. For now, the offer applies in China, not Europe.

200 million kilometres a day gives the software its fuel

BYD justifies the guarantee with three pillars. The first is scale: the company says more than 3.15 million BYD cars with driver assistance systems are already on the road. The second is data: God’s Eye collects more than 200 million kilometres of driving data every day. The third is people: BYD says 5000 engineers work on driver assistance systems.

That data volume is the fuel of modern driver assistance. LiDAR, 4D millimetre wave radar, cameras and a central computer create a vast number of edge cases, which engineers can use to refine algorithms. According to the EV source, the God’s Eye B LiDAR version uses Xuanji Architecture 2.0, where raw sensor signals move directly to the central brain. BYD gives the system latency as eight microseconds. The sensor package also includes LiDAR with 1.6 times better angular resolution than before and 4D radar with a 400 metre detection range.

In Europe, this is first a reputation play, not a full function launch

In Europe, BYD currently sells itself mainly through electric car pricing, equipment and battery technology. Xuanji A3 and God’s Eye 5.0 could strengthen the brand’s technological image here over the next few years, but a fully functional Urban NOA system with a damage guarantee will not automatically appear in European cars.

Regulation is only part of the reason. Europe’s traffic environment, data protection rules, insurance model and liability law differ from China’s. If BYD wants to repeat the same guarantee model in Europe, it must convince not only buyers, but also insurers, authorities and type approval bodies.

Even so, BYD’s move is deeply uncomfortable for rivals. When a manufacturer says its system is good enough for it to cover damages, it is no longer selling only driver assistance convenience. It is selling trust. That could become the next big dividing line as electric car batteries, range and charging speeds become increasingly similar.

Technical snapshot

BYD presented the Xuanji A3 chip, which it calls China’s first self developed 4 nm automotive grade vehicle control chip.

A three chip configuration provides more than 2100 TOPS of computing power, and BYD says the chip supports L3 and L4 functions.

The God’s Eye B LiDAR version becomes optional across BYD’s full model range in China, priced at 12,000 yuan (about 1,520 euros).

Full Damage Coverage covers financial loss in China for one year if Urban NOA is used properly and the incident meets BYD’s terms.

BYD is investing more than 100 billion yuan (about 12.7 billion euros) in driver assistance development.

BYD used to make competitors nervous with batteries and price. Now it is trying something more difficult: making them nervous with confidence.