Can a Flood-Damaged Car Still Be Driven?
2 Answers
Flood-damaged cars should not be driven. This is because water has entered the vehicle compartment, submerging the chassis, floor, and even the engine. The dampness in the interior can easily lead to mold growth and unpleasant odors, while wiring harnesses and electronic control units are prone to corrosion, potentially causing malfunctions later on. Untreated metal components inside the car are also susceptible to oxidation and corrosion. Important Notes: During repairs, some absorbent materials may not be replaced but merely dried, which sometimes fails to completely eliminate internal moisture. During hot summer months, this can result in strong musty odors that may be harmful to health. Water can infiltrate wiring harnesses and the casings of onboard computers. Although all functions may appear normal after repairs, residual moisture in circuits can accelerate oxidation and damage to wires or circuit boards. Some untreated metal parts inside the vehicle may experience accelerated corrosion and oxidation due to remaining dampness after repairs.
Last time my car was half submerged in water, with the water level reaching the wheel hubs. I took a chance and tried to start the engine, but it wouldn't fire up. After towing it to the repair shop, we found water had entered the cylinders, causing the pistons to seize and the engine to be totaled. The wiring also short-circuited, nearly causing a fire. Experts warned me that if the water level exceeds the tires, never attempt to drive—water can invade the exhaust system or air filter, leading to hydro-lock and complete mechanical damage. Additionally, electronic control units frequently malfunction after water exposure, with a high risk of airbag failure. Repairs can cost tens of thousands, making it better to scrap and replace. Safety comes first—if your car is flooded, shut it off immediately, call a tow truck for a professional inspection, and don’t gamble with your life.