What are the issues with flood-damaged cars?

[Eli]

There will be a strong musty smell inside the car, the body will rust quickly, and it is prone to malfunctions, etc. Below is the relevant introduction: Flood-damaged cars: Generally referred to as water-damaged cars, these are vehicles where water has entered the cabin, affecting the chassis, floor, and even submerging the engine. Inside the car, there are large amounts of sponge, fireproof cotton, insulation cotton, and other fabric materials that are highly absorbent. During the repair process, these cotton materials are often not replaced but merely dried, sometimes leaving internal moisture that cannot be completely removed. During hot summers, the car may develop a strong musty smell, which can sometimes be harmful to health. Electrical issues: Water can enter wiring harnesses and the casings of some onboard computers. After repairs, all functions may appear normal, but residual moisture in the circuits can accelerate the oxidation and damage of wires or circuit boards.