Once the structural parts are partially damaged, even if they are repaired by stretching or knocking, the overall body rigidity cannot be restored. If they collide again, they are likely to "fall apart".
Extended data:
If the body cover is damaged or collided, as long as the structural parts are not damaged, even if it is repaired or replaced, it will not affect the driving safety. The hood can be understood as the "coat" of the vehicle. After the damage, it can be replaced by replacing the original parts, but the structural parts are different and cannot be disassembled and replaced casually. Once damaged, it is irreversible.
Once a car collides, it is usually the cover parts, such as hood, bumper and fender, that are damaged first. However, if the collision intensity is great, it will affect various structural parts in the engine compartment. Due to the large impact force, the fixing parts of each connecting part in the engine compartment are easy to shift.
People's Network-How to Identify Accident Cars? Teach you to choose used cars.