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.

Vetting takes a day and can save you thousands. Work through this checklist. Verify the business: ask for the company registration number and check it on China's National Enterprise Credit Information system or a commercial registry tool. Confirm the registered address matches where they claim to operate, and that their business scope includes vehicle export. Check export credentials: they must hold a used-vehicle export license issued by Chinese commerce authorities. Ask for the license and a recent export declaration showing they actually ship cars. Test their knowledge: a real exporter answers detailed questions about your destination country's import rules (age limits, left/right-hand drive, emission standards) without hesitation. Vague answers about your own country's requirements are a red flag. Structure payments safely: small deposit (10-20%), balance only against inspection reports and shipping documents, ideally through a payment method with recourse. Refuse full prepayment by irreversible transfer—no legitimate exporter requires it.

Temperature differences during sea transport can easily trigger the tire pressure warning. After inflating the tires to the standard pressure (usually 2.5 Bar), most vehicles will automatically clear the warning after driving a few kilometers; some models require manually clicking "Tire Pressure Reset" in the "Vehicle Settings" on the central screen.