On May 1, the topic “Xiaomi SU7 Ultra Limited to 1,500 Horsepower” went viral on Weibo, generating 20.98 million views and 8,828 discussions, quickly climbing the platform’s trending list. Soon after, the hashtag “Xiaomi Responds to SU7 Ultra’s 1,500-Horsepower Limit” also drew wide attention.
The controversy began when Xiaomi rolled out an epic OTA update for the SU7 Ultra. According to the Xiaomi HyperOS update notes, new features included a dynamic speed warning system, account login restrictions on top speed and power, and a lap-time qualifying mode. The latter required drivers to achieve Xiaomi’s recommended lap times on designated racetracks in order to unlock the car’s full 1,548 PS output; otherwise, horsepower would remain capped.
Previously, unlocking the “Qualifying Mode” only required users to study driving safety guidelines and pass an in-app safety test. Xiaomi had explained that once drivers passed, they could access Drag Racing Mode or Track Mode, enabling the full 1,548 PS either through launch control or one-button Boost.
Reactions among owners and netizens were divided. Some supported the cap, arguing that 1,500 horsepower is far beyond the control of ordinary drivers and should only be unlocked by those with proven track skills. Others criticized Xiaomi for restricting the very performance that attracted them to the car, saying the move undermined consumer rights.
Xiaomi responded that the restriction was intended for safety reasons, noting that maximum horsepower is only meaningful on racetracks with proper tires and equipment. The company pointed out that there had already been cases of reckless SU7 Ultra owners street racing at night.
Launched on February 27 and delivered starting March 2, the SU7 Ultra is Xiaomi Auto’s second production model and a high-performance version of the SU7. Priced at RMB 529,900, it features extensive carbon fiber components, forged 21-inch wheels, and a tri-motor AWD system (dual V8s + one V6), producing up to 1,548 PS, with 0–100 km/h acceleration in 1.98 seconds and a top speed of 350 km/h.
Ultimately, Xiaomi confirmed that the horsepower-limiting OTA was only pushed to a small group of test users and has since been withdrawn, halting further rollout.
