Xiaomi SU7 Ultra presents critical engine defect after intense use and generates warranty impasse

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Xiaomi SU7 Ultra

Xiaomi SU7 Ultra - Divulgação/Xiaomi

An example of the Xiaomi SU7 Ultra electric hypercar, recognized for its extreme power of 1,548 hp, is inoperable after suffering a catastrophic failure in the rear engine control unit. The vehicle, belonging to an owner residing in Minsk, had to be transported to a specialized workshop in Moscou, as local service centers did not have the necessary expertise to deal with the model’s complex technology.

History of use and performance in competitions

The car was purchased in the summer of 2025 through an importer who initially used the vehicle for promotional purposes in Belarus. The sale took place with low mileage and a value close to cost, under a contract that specified the absence of warranty for used units. Desde the acquisition, the car was subjected to an intense regime of use, frequently participating in drag races and recording significant milestones, such as covering 402 meters in just 8.85 seconds.

Xiaomi SU7 Ultra – Foto: Divulgação

Technical diagnosis points out thermal stress

The failure occurred suddenly outside the competition environment, shortly after the vehicle was operated in high performance mode, capable of delivering instantaneous acceleration. Technical analysis carried out on the Rússia indicated that the control unit was damaged, with thermal stress identified as the most likely cause. Embora there is a hypothesis of a manufacturing defect in the component, experts believe that the history of recurrent overloads on the tracks contributed decisively to the collapse of the system.

Contract dispute and repair process

The owner claims that drag mode is a native feature of the vehicle and that the system should support the energy demands projected by the manufacturer. On the other hand, the selling company reinforces that the transaction between legal entities excludes the application of consumer protection laws and that severe use in races invalidates claims about durability. Atualmente, technicians try to recover the defective part while preserving the main processor, while the vehicle owner continues to pay the leasing installments, even with the car immobilized in another country.