A Carfax report is a vehicle history document that shows accident records, service records, title status, and ownership changes pulled from insurance companies, repair shops, and DMV databases

When you run a vehicle identification number (VIN) through Carfax, you get a compiled record of what happened to that specific car. The report pulls data from insurance claims, collision repair facilities, auction houses, and state motor vehicle departments. It does not pull data from every repair shop—only those that report to Carfax—so a clean report does not mean the car was never damaged or serviced.

Carfax costs money to run (typically $25 to $40 per report, though prices vary). Many dealerships run it for you at no charge, and some used car listing sites include a Carfax link with the listing. You need the VIN to order one, and you can run it from Carfax.com or through most major used car marketplaces.

Key Takeaways

  • A Carfax report shows accident history, service records, title problems, and ownership changes, but only includes data from shops and insurers that report to Carfax.
  • The report does not may provide a car is safe or reliable—it is a record of reported events, not a mechanical inspection or safety assessment.
  • Title problems (salvage, flood, lemon law buyback) are the most important red flags to watch for, because they affect resale value and insurance.
  • A clean Carfax does not mean a car has never been in an accident or had major repairs done at independent shops that do not report to Carfax.
  • You should always have a mechanic inspect the car in person, regardless of what the Carfax report shows.

What actually appears in a Carfax report

The report is organized into sections. The title section shows whether the car is branded as salvage, flood, lemon law buyback, or has any other title problem. This is the most critical part—a salvage title means the car was declared a total loss by an insurance company at some point, and a flood title means it was damaged by water. Both of these affect insurance rates and resale value permanently.

The ownership history section lists how many owners the car has had and when ownership changed. More owners does not automatically mean the car is worse, but it can suggest the car had problems if people kept selling it quickly.

The accident and damage section shows reported collisions, but only those reported to insurance or to a collision repair shop that feeds data to Carfax. If someone hit a parked car and paid out of pocket, or had minor damage fixed at an independent shop, it will not appear here.

The service records section shows maintenance reported by dealerships and some independent shops. Again, this is incomplete—many independent mechanics and owner-performed maintenance will not show up.

What Carfax does not tell you

A clean Carfax report does not mean the car is in good condition. It means no reported accidents or title problems appear in the databases Carfax can access. A car can have been in an accident, had the damage repaired at a shop that does not report to Carfax, and still show a clean history. This is especially common with minor collisions and repairs done at small independent shops.

Carfax also does not perform a mechanical inspection. It does not know whether the transmission is about to fail, whether the engine burns oil, or whether the suspension is worn out. It is a record of reported events, not a health assessment of the car itself.

The report also does not include maintenance done by the owner themselves—oil changes, brake pads, air filters—unless the owner took the car to a dealership or a shop that reports to Carfax. So a car with no service records on Carfax might have been meticulously maintained, or it might have been neglected.

Red flags that matter on a Carfax report

Salvage or flood title is the biggest red flag. These cars can be repaired and driven legally, but they carry permanent marks on the title that affect insurance and resale. Some insurers will not insure a salvage title car, and those that do charge significantly more. If you are buying a salvage title car, understand that you are accepting a permanent discount on resale value.

Multiple accidents in a short time suggests either a careless driver or a car with handling problems. One accident does not disqualify a car, but three in two years is worth investigating further.

Structural damage is worse than cosmetic damage. If the report shows frame damage or unibody damage, the car's structural integrity has been compromised. Even if it was repaired, it may never be as strong as it was before, and it will be harder to sell later.

Odometer rollback** is rare but serious. If the mileage goes backward between entries, someone tampered with the odometer. This is fraud and a reason to walk away.

How to use a Carfax report when buying a used car

Run the Carfax before you fall in love with the car. It takes five minutes and costs less than a tank of gas. If the title is clean and there are no major red flags, move forward. If there are accidents listed, ask the seller or dealer what happened and whether the damage was structural or cosmetic.

Do not use Carfax as your only inspection tool. A clean report is not a pass, and a report with accidents is not automatically a fail. The report is one piece of information. You still need a pre-purchase inspection by a mechanic who can put the car on a lift, check for frame damage, listen to the engine, and test the brakes and suspension.

If the report shows service records at a dealership, that is a good sign—it suggests the owner followed the manufacturer's maintenance schedule. If there are no service records at all, ask the seller for receipts or service history from independent shops. If they have nothing, assume the car may not have been maintained well.

Title problems and what they mean for you

A salvage title means the car was declared a total loss by an insurance company because the cost to repair it exceeded a certain percentage of its value (usually 70 to 80 percent, depending on the state). The car was then repaired and resold. Salvage title cars are legal to drive, but they are harder to insure and harder to sell. Some states require a safety inspection before a salvage title car can be registered.

A flood title means the car was damaged by water—from a flood, hurricane, or other water event. Water damage can affect the electrical system, engine, transmission, and interior for years after the event. Flood title cars are also legal to drive but carry permanent marks on the title.

A lemon law buyback means the manufacturer bought the car back from the original owner because it had repeated defects that could not be fixed. The car was then resold. Lemon law buybacks are rare and usually indicate the car had serious problems.

Any of these title problems will lower the car's resale value permanently and may make it harder to insure. If you buy a car with a branded title, you are accepting that you will have fewer buyers when you try to sell it later.

Carfax versus other vehicle history services

Carfax is the largest and most widely used vehicle history service, but it is not the only one. AutoCheck (owned by Experian) and the National Motor Vehicle Title Information System (NMVTIS) are alternatives. NMVTIS is a government database that includes title information from all 50 states and is free to search online. AutoCheck costs money but sometimes catches accidents that Carfax misses because it pulls from different sources.

Many buyers run both Carfax and AutoCheck on a car they are seriously considering. If one shows an accident that the other does not, that tells you something about the repair shop that handled it—it reported to one service but not the other. Neither service is complete, so checking both gives you a more complete picture.

For title information specifically, NMVTIS is the official government record and is always free. You can search it at vehiclehistory.bts.gov. It will show you whether a car has a salvage, flood, or other branded title, but it does not show accident history or service records the way Carfax does.

Frequently Asked Questions

Can I get a free Carfax report?

Some dealerships and used car listing sites provide free Carfax reports with their listings. You can also check whether your insurance company offers free reports as a customer benefit. Otherwise, you pay per report—typically $25 to $40. Some services offer discounts if you buy multiple reports at once.

What if the Carfax report shows an accident but the car looks fine?

Minor accidents can be repaired well enough that you cannot see the damage from the outside. Have a mechanic inspect the car and specifically ask them to check for frame damage, alignment issues, and signs of repair. They can often tell whether a car was in an accident even if the damage is not visible.

Does a clean Carfax mean the car is safe to buy?

A clean Carfax means no reported accidents or title problems appear in Carfax's databases. It does not mean the car is mechanically sound or that it was never in an accident. You still need a pre-purchase inspection by a mechanic to check the engine, transmission, brakes, and suspension.

What should I do if I find a major accident on the Carfax?

Ask the seller or dealer for details about what happened and what was repaired. If it was structural damage, get a mechanic to inspect the car before you buy it. If the seller cannot or will not provide details, that is a reason to walk away and look at another car.

Can I negotiate the price down if the Carfax shows an accident?

Yes. An accident history, especially structural damage, lowers the car's value. Use the Carfax report as part of your negotiation. Get a mechanic's estimate of any remaining damage or wear, and use that to justify a lower offer.