DigiTimes复盘尊界V800刹车支架断裂及三部门联合调查，但核心事实（10月15日晚成立联合调查组）已公开并被市场消化，无新增事实

China's premium electric vehicle (EV) market is facing renewed safety scrutiny following product defect concerns. Maextro, an ultra-luxury automotive brand jointly developed by Huawei and JAC Motors, has sparked widespread public debate over vehicle safety and testing standards after its V800 MPV suffered consecutive brake pedal bracket fractures during dynamic braking tests.

In response, three major Chinese regulatory bodies—the Ministry of Industry and Information Technology (MIIT), the Cyberspace Administration of China (CAC), and the State Administration for Market Regulation (SAMR)—announced the formation of a joint task force to conduct a comprehensive investigation into the matter. Maextro subsequently stated that it would fully cooperate with the probe and await the official findings from the authorities.
Maextro is a top-tier luxury brand born from the collaboration between Huawei and JAC Motors, serving as a key pillar in Huawei's strategy to penetrate the ultra-high-end automotive market via its Harmony Intelligent Mobility Alliance (HIMA). Under this partnership, Huawei supplies smart-vehicle technologies, brand resources, and sales channels, while JAC handles complete-vehicle manufacturing and production infrastructure.
Brackets break in road tests
The controversy erupted on October 8 after the popular automotive media outlet DCar published a real-world testing video. The footage revealed that during emergency braking tests at 100 km/h, the brake pedal brackets broke on three brand-new Maextro V800 vehicles, sparking immediate market concern.
On the day the video surfaced, Maextro issued a public statement emphasizing that the V800's braking system underwent R&D and validation processes exceeding national standards and industry specifications. The brand also noted that since initial customer deliveries began, no incidents of brake pedal bracket base fractures had been reported by vehicle owners.
Maextro added that although the test involved extreme operating conditions, it would still optimize the design of the relevant components and offer free upgrades to existing owners.
However, Maextro's explanation of the test conditions failed to quell public skepticism. The core issue remains whether the structural failure during full-stop emergency braking was caused by defects in component design, materials, and manufacturing, or whether it was triggered by specific external testing parameters—a question that requires official clarification.
Lab tests pass, questions remain
On October 13, Maextro released third-party laboratory test results. According to the disclosure, a nationally accredited testing institution completed component evaluations on October 11, confirming that the sample met the QC/T 788-2018 industry standard. Under this standard, a pedal must withstand a longitudinal force of 1,500 newtons with displacement under 5 mm. The institution also conducted an enhanced load test at 3,000 newtons, during which the pedal showed no visible cracks or structural failure.
Although the component passed static bench tests, the discrepancy between laboratory compliance and structural failure during high-speed dynamic road tests highlights the fundamentally different testing environments. This gap prompted Chinese authorities to step in with a multi-departmental investigation team, which Maextro has pledged to actively support.
For Maextro, this incident extends beyond the engineering quality of a single component; it directly impacts market trust in the high-end luxury brand built by Huawei and JAC Motors.
With regulators now involved, the investigation will determine whether the cause of the bracket failure can be pinpointed, whether the vehicle design meets safety standards, and whether further corrective measures or recalls will be required. The outcome will not only affect Huawei's automotive brand equity but will also shape market perception regarding the safety and quality management of China's premium new energy vehicles.