What parts of a car are prone to malfunction after being submerged in water?
2 Answers
After a car is submerged in water, the following parts are prone to malfunction: 1. Electrical circuits: After the vehicle is submerged, water can enter the connectors of many circuits, both inside and out. Since circuits are usually hidden behind interior panels or in boxes, the water is not easy to dry or evaporate. Over time, this can lead to short circuits in the wiring or corrosion of electrical connectors, resulting in poor contact. In more severe cases, short circuits can cause sparks or overheating wires, which may lead to a fire. 2. Odors: Many car floor mats are made of plush materials, which are difficult to dry once soaked. This can lead to unpleasant odors and, over time, mold and foul smells. It is recommended to take the vehicle to an interior detailing shop to thoroughly clean it after being submerged in water.
As an automotive researcher, I have handled numerous flood-damaged vehicle cases. Post-flooding failures mainly concentrate on several systems: engine water intrusion may cause hydrolock, where water enters the cylinder compression space damaging pistons and connecting rods; electronic components like ECUs, ABS modules, or sensors are prone to short circuits and burnout; flooded interiors lead to moldy carpets and malfunctioning seat electronic controls; water in the brake system reduces braking efficiency; accumulated water in AC evaporators causes electrical leaks and odors; accelerated corrosion in exhaust systems; and potential short-circuit failures in batteries and alternators. I recommend not starting the engine, immediately disconnecting the battery, and towing the vehicle to a repair shop. Thorough inspection includes drainage, drying wiring harnesses, and testing critical components to minimize post-flooding complications. Safety should always be the top priority.
