Flooded Car? What to Do Next

On the Space Coast, floodwater reaches cars in more ways than a direct hurricane hit — storm surge pushing up the Indian River Lagoon, tidal flooding on low-lying beachside streets, a summer downpour that swamps an intersection faster than the drains can keep up. What you do right after your car sits in water has a lot to do with whether it can be repaired, and what that repair costs.

What Should You Do Right After Your Car Has Been in Floodwater?

Start with your own safety. Don’t wade into floodwater to reach a car — the National Weather Service warns that 6 inches of fast-moving water can knock over an adult, and the road beneath may have collapsed. Wait until the water has gone down.

Once it has:

• Don’t start it. Leave the key off and don’t press the start button.
• Disconnect the 12-volt battery if you can reach it safely. Taking power off the system reduces the chance of a short in wet wiring.
• Document everything. Photograph the water line outside the car and inside the cabin, engine bay, and trunk. Note whether it was rainwater or salt or brackish water from surge or the lagoon.
• Call your insurer as soon as you can and ask how they want the car handled.
• Start drying the interior. Open the doors and windows if the weather allows and pull out wet floor mats. Florida humidity lets mildew set in quickly — see a musty A/C smell and a wet floor for what lingering moisture does inside a cabin.
• Have it towed, not driven. We can help coordinate a tow to the shop.

Why Shouldn’t You Start a Flooded Engine?

An engine is built to compress air and fuel. Water doesn’t compress. If floodwater got into the air intake and reached the cylinders, cranking the engine forces the pistons up against it. That’s called hydrolock, and it can bend connecting rods, crack pistons, or in severe cases crack the block.

Not every flooded car hydrolocks. It depends on how high the water came relative to the air intake, and on whether the engine was running when the car went in. A small amount of water may not cause damage you notice right away — which is why an engine that starts and seems fine isn’t proof that it’s healthy. The safe order is to check the air filter and intake and pull the spark plugs before anyone turns the engine over.

Water also finds its way into fluids. Water-contaminated oil often looks milky or tan, though a clean dipstick isn’t proof, and it protects bearings poorly. Transmissions and differentials breathe through vents that can pull water in, and water can get into the fuel system too. Running on contaminated fluids is how a flood problem becomes an engine repair or transmission repair problem.

Then there’s the electrical system. Water in modules, sensors, and connectors can short circuits right away, and corrosion keeps working after the car dries — which is why flood cars often develop electrical faults later. Salt water makes this worse: it conducts electricity better and corrodes metal faster than fresh rainwater, so a car that sat in brackish lagoon water or storm surge generally fares worse than one that sat in rain runoff at the same depth.

If you drive a hybrid, tell your insurer and the shop that it was in water. Don’t touch its orange high-voltage cables; that system needs checking before any start.

What Are the Signs of Flood Damage?

Look for:

• A water line — a band of dirt or debris on door panels, seats, or in the engine bay
• Silt or mud under the carpets, in the trunk and spare-tire well, in the glove box, and under the dash
• A musty or mildew smell — or a heavy air-freshener smell that may be covering it
• Water or silt inside headlights and taillights
• Rust or corrosion out of place for the car’s age and location — on seat rails, under the dash, and underneath the car
• Electrical gremlins — intermittent windows, locks, gauges, or lights
• Warning lights for the airbag, ABS, or check engine system

The last two have plenty of other causes; they point to flooding when they show up alongside the others.

How Do You Spot a Flood Car When Buying Used?

After a major storm, flood-damaged cars can be cleaned up and resold. Florida law (section 319.14(1)(b), Florida Statutes) requires a flood-totaled vehicle’s title to say so conspicuously, and the Florida Department of Highway Safety and Motor Vehicles (FLHSMV) says dealers must disclose a branded title in writing. But a flood car that was repaired without an insurance total may carry no brand at all, branding standards vary by state, and FLHSMV notes that a flood-damaged car from another state can be sold in Florida with a clean title.

So check more than one way:

• NICB VINCheck. The National Insurance Crime Bureau’s free VINCheck at nicb.org shows whether a vehicle has been reported as salvage or flood-damaged by participating insurers. A clean result isn’t a guarantee, since not every insurer reports.
• The FLHSMV Motor Vehicle Information Check. For a Florida-titled car, it confirms the vehicle description and shows any title brands. The federal NMVTIS at vehiclehistory.gov covers title and brand history across states.
• A vehicle history report such as a Carfax.
• A pre-purchase inspection. A history report is a record; an inspection looks at the car itself. Ours covers body damage and paint, oil leaks, suspension damage, brakes, tires, and every maintenance item, and we compare the Carfax history to the car.

Will Insurance Cover a Flooded Car?

Flood damage to a car is typically covered under comprehensive coverage, not liability — liability-only policies usually won’t pay for damage to your own vehicle. Check your policy and deductible, and call your insurer promptly.

An adjuster will usually inspect the car. If the repairs would cost too much relative to the car’s value, the insurer may declare it a total loss. In Florida, FLHSMV says an insurer brands a flooded car it totals, reports it to the state, and often handles the salvage title on the owner’s behalf.

If it isn’t totaled, keep your photos and records — flood-related electrical problems can surface after the first estimate, so ask your insurer how they handle damage found later.

How Can Master Team Automotive Help After a Flood?

We can help coordinate a tow to our West Melbourne shop, so the car never has to be started to get here. From there:

• Electrical diagnostics. We connect professional scan tools to read live data and fault codes across the vehicle’s control modules, then trace faults to the corroded connector, broken wire, or shorted circuit — and repair them in-house.
• Engine diagnostics. We test live data, fuel and ignition delivery, and compression where warranted to find what’s actually wrong.
• Transmission diagnosis when shifting or engagement isn’t right after the water.
• Free battery testing, including a check of the charging system.

Whatever we find, we’ll tell you what’s wrong, what it costs, and what can safely wait before any work begins. That’s the standard at our ASE-certified, family-owned shop, held since 1998. If you’re getting ready for the next storm instead, start with our hurricane season vehicle checklist.

If your car has been in floodwater, call Master Team Automotive at (321) 722-1481 before you try to start it. We’re at 6000 Technology Drive, Unit A in West Melbourne, open Monday through Friday, 9 a.m. to 5 p.m.