
It is not recommended to start a water-damaged car directly. In addition to the engine, the vehicle also contains many electronic components. Starting it without inspection may cause severe damage to the car. It is advisable to have it checked at a 4S dealership before driving if no issues are found. Below is relevant information about water-damaged cars: Definition: A water-damaged car refers to a vehicle that has been submerged in water, typically meaning the engine and transmission have been waterlogged, with the immersion depth exceeding the wheels and body seats, and the bottom components of the vehicle being in prolonged contact with water. Such cars pose significant risks, as the electrical circuits are prone to short circuits, fires, etc. Insurance: There are two types of insurance related to water damage in vehicles: the most common one is auto damage insurance, and the other is called special engine loss insurance, commonly known as water damage insurance.

With thirty years of driving experience, I can tell you that waterlogged vehicles must never be driven immediately. Two years ago, my neighbor forced his flooded car to move, resulting in water entering the engine, locking it up, bending all the piston rods, and costing tens of thousands in repairs. Water seeping into the engine or electrical systems can cause short circuits and rust, leading to rapid depreciation over time. If your car gets flooded, the first thing to do is turn off the engine and stop the car—never attempt to restart it, as this can worsen the damage. Call a tow truck to take it to a professional repair shop to check the air filter, intake, and wiring harness. Prevention is key: avoid driving through standing water in rainy weather unless you're sure of the depth, to avoid the hassle of insurance claims later. The risk is high when water reaches above half the wheel hub—safety is paramount, so don’t gamble with lives. Park safely and wait for rescue.

As someone who frequently tinkers with cars, I've dealt with waterlogged vehicle issues. A car might still run shortly after going through water, but the hidden dangers are significant. Water entering the exhaust system or cabin can cause strange noises or electrical failures, such as dashboard malfunctions. Try checking the air intake and air filter box; if they're not soaked, you might slowly move out of shallow water, but don't risk driving at high speeds. Repair costs are often much higher than towing fees—fixing the engine once could cost you enough to buy a used car. Additional advice: Disconnect the battery cable after flooding, wait for the water to drain before simple tests; reporting water damage to the insurance company might cover some losses, but don't save small money only to spend big—safety comes first. For prevention, installing underbody protection can reduce the risk of water ingress.

I once helped a friend repair a car damaged by water. Flood-damaged cars need to be assessed case by case: if water has entered the air intake, never start the engine—it could lead to hydro lock and severe engine damage. If the water is shallow, you might gently press the accelerator to move slowly, but this is very risky. The best option is to stop the car and call a tow truck for inspection. Water causes strong corrosion to electronic components and the exhaust system, and driving shortly after exposure can lead to increased vehicle abnormalities, making repairs troublesome and expensive. Stay calm when driving through water—avoid sudden acceleration—and afterward, clean any internal water accumulation to prevent rust.


