Wang Hua, the general manager of the Public Relations Department at Xiaomi Group, recently addressed the reported brake failure incident involving the Xiaomi SU7 vehicle.
Issue Resolved
In response to the situation, it was confirmed that the problem has been resolved. On May 9, an SU7 car was brought to the Changsha Service Center where it underwent inspection. Staff at the center found no mechanical issues with the braking system. Following a self-inspection program, the brake failure prompt disappeared, and the vehicle was deemed to be operating normally.
Software Misidentification
Upon investigation, it was discovered that the main braking system of the Xiaomi SU7 was misidentified by the software. Specifically, the vehicle's main brake controller system was misidentified and downgraded, leading to the activation of the backup braking mechanism. The auxiliary brake controller then took over to provide braking and deceleration for the vehicle. The car's onboard display also indicated a braking system failure during this process.
Backup System Operation
When the backup braking system was engaged, the Electronic Stability Program (ESP) utilized the brake fluid from the main brake controller to increase braking pressure on the wheels for stopping the vehicle. This caused a rapid decrease in pressure within the brake master cylinder, noticeable to the driver through the brake pedal. Despite the pressure drop in the main brake system, the vehicle never completely lost its ability to brake. Thankfully, the ESP managed the situation effectively, preventing any loss of control over the vehicle.
In light of the incident, the user was given the option for a return or exchange of the vehicle. Xiaomi Auto also expressed readiness to cover any expenses associated with the return or exchange process.
