How to check a VIN before buying a used car

That is ten minutes of work and it costs less than a tank of fuel. Skipping it is how people end up owning a rolled-back odometer, a rebuilt wreck or somebody else's loan collateral. The six steps below are that checklist in order - including the last two, which are the ones most buyers skip.

Step 1. Find the VIN in more than one place

The VIN is a 17-character serial number (letters and digits, never I, O or Q). On most cars it appears in several places:

• the base of the windshield, driver's side, visible from outside;
• the driver's door jamb sticker (with tire pressures and build date);
• the engine bay, stamped on the body or on a plate;
• the registration document and the insurance policy;
• under the trunk floor or on the frame rail on some models.

Read at least two of them and confirm they match each other and the documents. Ask the seller for the VIN before you travel - a serious seller sends it without hesitation. A seller who refuses to share the VIN "for privacy reasons" has told you something useful.

Step 2. Check that the VIN itself is plausible

Before paying for anything, run the free check. It decodes the VIN and validates its check digit where applicable. You are looking for two things:

1. The VIN decodes to the car in the advert. Year, make, model, engine and body style come from the VIN itself. If the ad says 2019 but the VIN decodes to 2016, or the trim badge does not match the decoded trim, stop and ask why.
2. The VIN plate looks untouched. Rivets that do not match, a sticker over a stamp, paint over the door-jamb label, or a windshield plate that sits loose are signs of a re-VINed car - often a stolen car wearing the identity of a written-off twin.

Step 3. Run the history report

The free preview shows how many records exist in each section before you pay. Then the full report gives you the records themselves. The sample report on this site is a complete one for a real 2003 Honda Accord - 109 records across ten sections - and it is the fastest way to see what each section actually contains before you buy one.

Read the sections in this order:

• Title and brands. Any salvage, rebuilt, flood, junk or odometer brand changes the price of the car and possibly the decision (the title brands guide explains each one). A clean current title with a brand in the history means the brand was left behind at a state line, not that it never happened.
• Odometer readings. Plot the mileage in your head against the dates. It should climb steadily, roughly 10,000–15,000 miles a year for a typical car. A reading that drops, or a car that "stopped aging" three years ago, needs an explanation.
• Accident and damage records. Note the dates and severity. Small cosmetic claims are normal life; a structural or airbag-deployment record on a car advertised as accident-free is not.
• Theft records. A car listed as stolen and not recovered cannot be legally sold. An active theft record is a walk-away, not a negotiation.
• Sale and auction listings. Old listings show the car's condition, mileage and asking price at earlier points in its life - and old photos are useful for spotting repainted panels.
• Open recalls. Free to fix at a franchised dealer; take the campaign numbers with you.

Step 4. Match the report against the car

Records only help if you compare them with reality:

• Mileage. The last recorded reading should be at or below what the dashboard shows now, with a believable gap. In the sample report the last recorded reading is 148,985 mi, from a Virginia title issued on 26 March 2019 - everything the car has driven since then is simply not in any database, which is why the report also carries an estimated current mileage (216,454 mi) as a separate, clearly labeled number. Service stickers in the door jamb and wear on the steering wheel, pedals and driver's seat should agree with what the dashboard shows.
• Photos. If the report includes auction or listing photos, compare panel gaps, wheels and interior trim with the car in front of you.
• Repairs. If the history shows an accident, look at that end of the car: paint depth, panel alignment, non-original bolts on the fenders, overspray on rubber seals.
• Ownership pattern. Many owners in few years, or registrations hopping between states, are worth a question each. The sample car has had four owners since 2002 - in Pennsylvania, then Maryland, then DC, then Virginia - and the report puts an average miles-per-year figure against each completed ownership: 12,851, then 8,825, then 4,207.

Step 5. Match the report against the seller's story

Ask the seller open questions you already know the answers to: How long have you owned it? Has it ever been in an accident? Any finance owing? Honest answers that match the report build confidence. Answers that contradict the report - "one owner from new" when the report shows four - tell you how the rest of the negotiation will go.

Also ask for the service book and invoices. A history report shows what was reported; a service file shows what was done. The two together are far stronger than either alone.

Step 6. Before the money moves

• Verify the seller's identity matches the registration document.
• Check for outstanding finance or liens where the report or a national register shows them; a lien means the lender, not the seller, may own the car. Liens are common and usually harmless - the sample report lists six, all recorded at title transfers between 2002 and 2018 - but each one needs a release.
• Get the agreed condition, mileage and "no undisclosed accidents" statement in writing on the receipt.
• If anything in the report was serious - a brand, a big accident, an odometer gap - make the sale conditional on an independent inspection on a lift.

The one-line version

Decode the VIN for free, read the preview counts, buy the report when the car is worth a viewing, and spend your viewing checking the car against the records instead of kicking the tires. The sellers you need protection from are counting on you not doing this.