Xiaomi SU7 Crash Investigation: Door Couldn't Open Due to Low-Voltage Failure

Final investigation results for the fatal Oct 13, 2025, Chengdu crash involving a Xiaomi SU7 Ultra have been released.

According to the judicial appraisal report from Sichuan Xihua Traffic Judicial Appraisal Center, the vehicle was traveling at 167 km/h at impact (over 200 km/h seconds before) — exceeding the 80 km/h limit — with the driver suspected of drunk driving. After hitting another car, it crossed the median and caught fire, killing the driver.

Critical finding: doors couldn't open from outside because the low-voltage system failed after collision, disabling electronic door handles. The high-voltage battery short-circuited from impact, sending abnormal current into the low-voltage circuit. The car has electronic release buttons with no external mechanical emergency handles. Death was caused by burns, not collision injuries.

Driver's family disputes responsibility attribution and hasn't reached compensation agreement with Xiaomi.

Source : China News Service