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).

Before export, we perform a standard external wash and interior vacuuming to meet basic hygiene inspection requirements by customs. However, we do not engage in deceptive "refurbishments" (such as repainting large areas with cheap paint or using low-quality interior refurbishing agents) to preserve the vehicle's true physical condition for buyer assessment.

If insurance claims records are accessed, there will usually be notes like "the insured vehicle is fully responsible for hitting a fixed object" or "third-party liability insurance payment." We can roughly reconstruct the accident scene based on this and cross-verify the stress points on the vehicle's frame with paint thickness gauge data.