There are several ways to spot a flood-damaged car. Foggy windows, especially after the car has been parked overnight, can indicate moisture inside the vehicle. A musty odour in the seats, carpets, or upholstery is another common sign. Additionally, check for moisture under mats, carpets, and seat rails, as well as rust in hidden areas like screws, hinges, and the spare wheel compartment. Inspect the upholstery for mismatched or discoloured parts, and ensure all electronics, including lights and audio systems, are functioning properly. Finally, check the oil for signs of water contamination, such as a pale or sticky texture.