We use two steps: 1. Insert a medical-grade endoscope through the spark plug hole to visually inspect cylinder wall scratches and carbon buildup on the piston top; 2. Extract an engine oil sample to check for large metal debris or emulsification (caused by coolant leakage).

Based on practical risk assessment, we strongly recommend setting aside 3% to 5% of the car price as a buffer fund for even the highest-rated used cars, to cover oil changes, new tires, minor shipping scratches, and local inspection labor costs.

Chinese customs strictly prohibits the export of assembled or cut vehicles that meet mandatory scrapping standards. Since our pre-inspection is very strict, this situation is highly unlikely. However, if the vehicle is detained and returned by customs due to a policy misjudgment, we will fully refund your deposit without interest, ensuring you bear no policy risk.