Buying a Used Car After Storm Season: Tire Clues

Storm season ends. The flood cars don't disappear.

Hurricane season officially ends November 30. Cars that sat in floodwater during the season don't all go to the crusher. Some are repaired properly and sold with an honest title. Others are dried out, cleaned up and offered for sale with no mention of the water.

Michigan's consumer protection office puts it plainly: flood-damaged vehicles can be shipped across the country in a matter of days and show up online or on lots far from the storm, without any obvious signs of damage. That works in both directions. A car flooded elsewhere can end up for sale in Broward.

This guide covers three layers of checking: the paperwork, the car, and the tires, which carry more clues than most buyers think.

Layer 1: Run the VIN before you drive across town

Two checks are worth running on any used car bought after a storm season:

• NMVTIS. The National Motor Vehicle Title Information System is a federal database overseen by the U.S. Department of Justice. A report covers the current title, brand history (labels states assign, such as "junk," "salvage" or "flood"), odometer readings, total-loss history and salvage history. Reports come from approved providers for a small fee.
• NICB VINCheck. The National Insurance Crime Bureau's free tool checks a VIN against insurer-reported salvage, flood and theft records. NICB is clear about its limits: it only covers participating insurers and isn't a complete vehicle history.

Also run the VIN through NHTSA's recall lookup (opens in a new tab). It won't show flood damage, but it will show open safety recalls.

A clean report is a good start, not proof. A car that was never reported won't carry a brand.

Layer 2: Look, touch and smell

Michigan's guidance lists the signs to look for:

• Musty or "over-perfumed" smells, or signs of mold or mildew
• Water stains, mud or residue in the trunk, under the carpet and floor mats, and around the gas and brake pedals
• Grime in hard-to-reach places that are difficult to clean

AAA adds that salt water is harder on a car than fresh water, because salt is highly corrosive to both the interior and mechanical parts. In coastal South Florida, that matters.

Then get an independent inspection from a technician with no connection to the seller. NHTSA's own guidance on flooded vehicles is not to drive one until a technician has checked it, because damage may not be visible.

Layer 3: What the tires and wheels can tell you

Tires are easy to inspect, and they say a lot about how a car has been treated.

The spare tire well

Lift the trunk floor. The spare well is a low point where water collects and a place most quick cleanups miss. Mud, silt, a waterline or rust here is worth asking about. Check the spare itself and the jack and tools stored with it.

The DOT date codes

Every tire carries a DOT code ending in a four-digit date: the week and year it was made. Read all four, and the spare:

• Four brand-new tires on an older car isn't a red flag by itself. But combined with new carpet or a fresh interior, ask why everything was replaced at once.
• Old tires are a budget item. Bridgestone and Michelin recommend replacement 10 years after a tire was made, and an annual inspection from five years. See how old is too old.

Matching and wear

• A matched set with even wear suggests regular rotation and alignment.
• Four different brands or tread patterns can mean the car has had tires replaced one at a time. On an all-wheel-drive car, ask the seller about it; many AWD manuals call for matched tires.
• Wear on one edge points to alignment or suspension issues. Our noise and vibration checker helps on the test drive.

Wheels and lug nuts

Look for heavy corrosion on the wheels, lug nuts and the brake parts visible through the spokes. Some rust is normal on an older car in a coastal state. Heavy corrosion on a car that looks spotless everywhere else is a question to ask.

Questions to ask the seller

A good seller won't mind these, and the answers are worth comparing with what you see:

• Where has the car been registered and driven? Ask for the title and any service records.
• Has it ever had water inside, or an insurance claim? Ask directly, then compare the answer with the NMVTIS and VINCheck results.
• When were the tires, carpet or seats last replaced, and why? Recent replacements are normal. Several at once deserve an explanation.
• Can my mechanic inspect it before I buy? If the answer is no, that tells you something too.
• Is there a spare, jack and lug wrench? Missing equipment is common and easy to fix, but worth knowing before you agree a price.

Measure the tread before you negotiate

Tires are part of the price of a used car. Measure each tire in three grooves. AAA recommends replacing at 4/32 of an inch for wet roads; NHTSA's line is 2/32. Our post on why 4/32 matters in Florida rain explains the difference.

The checklist

1. Run NMVTIS and NICB VINCheck; check recalls on NHTSA
2. Smell the cabin; look under mats and in the trunk
3. Lift the trunk floor and inspect the spare well
4. Read all five DOT date codes
5. Check that the tires match and wear evenly
6. Measure tread in three grooves per tire
7. Get an independent inspection before you buy

Already own a car that sat in water? Our post on what to check after a car sits in floodwater covers that case. If the tires are due, run them through Do I Need Tires Yet? and shop by size or vehicle.