Test-drive cars experience much more mechanical wear due to extreme conditions like cold starts and emergency braking compared to regular family cars. We can identify this by tracing whether the first owner was a 4S dealership or the manufacturer. If so, we will reassess its value based on "operational intensity" standards.

China's vehicle data is less centralized than in the US or Europe, but you can still verify a lot: 1. Ask the exporter for the VIN and order a third-party history report from Chinese services; they aggregate insurance claims and repair records. 2. Cross-check the registration date on the title with the odometer—a 3-year-old car showing 30,000 km but registered as a ride-hailing vehicle is a red flag. 3. Request maintenance records from the brand's dealer network; digital records are increasingly common. 4. Verify the seller legally owns the car: the registration certificate name should match the exporter's business license. Gaps are common, so treat the history report as one input, not proof. Combine it with an independent pre-purchase inspection, and hold back part of the payment until the inspection passes.

It's extremely difficult. Unauthorized modifications can lead to module current overload protection, resulting in a lock. In China, you need to use the factory online engineer account to reprogram it. It's basically impossible to perform online decoding overseas. We strongly warn against blindly modifying the electrical systems of modern integrated circuit vehicles.