Xiaomi has reversed a controversial software update that limited the full power output of its flagship SU7 Ultra electric sedan (see specs) following significant backlash from owners.

The dispute began when Xiaomi rolled out version 1.7.0 of its vehicle software, which restricted the car’s maximum output from 1548 horsepower to approximately 900 horsepower in normal driving conditions. To unlock full performance, owners must complete a qualifying lap time on approved racetracks through a new “Qualifying mode laptime assessment” system. The update also introduced a 60-second standby period for launch control, preventing spontaneous high-power starts at traffic lights.

A Xiaomi Auto spokesperson explained the restrictions were implemented for safety reasons, noting that the car’s extreme performance capabilities require proper track conditions and experienced handling. “The full 1548 horsepower output is designed for circuit use with appropriate tyres and preparation,” the company stated in response to customer inquiries. “We want to ensure owners can enjoy this performance safely.”

However, the limitations sparked immediate controversy among enthusiasts who had purchased the 529,900 yuan (approximately 73,000 USD) performance sedan specifically for its record-breaking acceleration and power figures. Online forums and social media platforms saw heated debates, with some owners arguing they should have unrestricted access to the vehicle’s advertised capabilities, while others supported the safety-focused approach.

Facing mounting pressure, Xiaomi ultimately withdrew the performance-limiting features, acknowledging the need for more transparent communication about future software updates. “We appreciate the passionate feedback from our community and will ensure better transparency moving forward,” a company representative said.

Xiaomi CEO Lei Jun positioned the SU7 Ultra as a technological showcase that “rivals Porsche in performance and Tesla in innovation.” It accelerates from 0 to 100 km/h in 1.98 seconds and has a top speed exceeding 350 km/h.

The incident underscores growing challenges for automakers as software-defined vehicles become more common. Performance limitations, safety features, and over-the-air update policies are increasingly becoming points of contention between manufacturers and performance-oriented buyers. As electric cars continue pushing performance boundaries, the industry may need to develop new standards for balancing raw capability with real-world usability.

Xiaomi claims it is committed to working more closely with its owner community when implementing future software changes. However, the company maintains that track environments remain the safest way to experience the SU7 Ultra’s full potential. The reversal of the performance restrictions demonstrates how quickly consumer expectations can reshape corporate decisions in today’s connected automotive landscape in China.