See if there are any traces of re-polishing the welding spots of the frame, whether there are any traces of re-trimming the frame, whether the paint of the frame is consistent with the paint inside the engine compartment, and whether there are any traces of re-painting or re-trimming.

Step 1 and Step 2: Observe the symmetry of the car body.

Checkpoint: Check the side of the car body for signs of collision repair. See whether the door is close to the body, whether it is warped and whether the door crack is uniform. If it is repaired or replaced, there will definitely be some defects.

Step 3: Check the left A-pillar and the left B-pillar of the vehicle.

Check points: whether there is deformation, cutting, sheet metal repair and painting, whether there is any distortion trace of door hinge bolt, sealing condition and whether there is any welding trace. This can be seen from the inside of the car, or whether the paint is smooth or not. Check the bottom plate and cross beam for knocking and welding marks.

Step 4: Check the front part.

Checkpoints: front side rail suspension and front shock absorber.

Check the longitudinal beam for deformation, cutting, deformation of the energy absorption hole, torsion marks on the suspension screws of the shock absorber, sealant and solder joints, and check the water tank bracket and the water tank for signs of repair or replacement after collision and deformation. If so, the water tank must have been repaired or replaced. After the water tank bracket is damaged, the engine or frame may be damaged by collision, so pay attention to the inspection of parts.