Once the car system (especially in a closed ecosystem) undergoes a major version upgrade, its bootloader is usually locked, preventing downgrades. If this happens, there is basically no solution in an overseas environment. Therefore, we strongly warn: do not blindly insert a USB drive to upgrade while offline.

Vehicles sold domestically in China only have the "Environmental Information List" and the "Vehicle Qualification Certificate," which are not the COC of the European system. We will provide a notarized English translation of the Chinese qualification certificate. If local customs strictly require the original European COC, the vehicle will not be able to clear customs.

Battery health is the single biggest risk when buying a used Chinese EV remotely. Ask for a battery report showing state of health (SOH) and cell voltage balance from the car's BMS or a diagnostic scan — anything below 85% SOH deserves a price reduction or a pass. Check fast-charge counts and whether the pack has warranty remaining; many Chinese EVs carry 8-year/150,000 km battery warranties that may or may not transfer. Verify real-world range from energy consumption history rather than the dashboard estimate. Also confirm the on-board charger works with your country's voltage, and ask whether the connected app and OTA updates will remain accessible in your region before you pay.