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).

Verify if the vehicle model is within the manufacturer's EU certification scope. If not, contact the certification company for single model certification; otherwise, it cannot be registered in Europe.

We will directly check the registration certificate (the big green book) and count the number of changes.