What Carfax does and what it shows you
Carfax is a private company that collects and sells vehicle history reports based on the vehicle identification number (VIN). When you enter a VIN on Carfax.com, you get a report that includes accident history, service records, title information, odometer readings, and ownership changes — all pulled from insurance companies, repair shops, DMV records, and auction houses that report to Carfax.
The report does not tell you everything about a car's past. Carfax only knows what gets reported to it. A minor accident that was paid for in cash and never reported to insurance will not show up. A transmission that was rebuilt by an independent shop might not appear if that shop does not report to Carfax. The company estimates that about 20 percent of accident damage never makes it into their database because it was handled outside the reporting system.
Carfax is useful as one piece of information when you are considering buying a used car, but it should not be your only source. A clean Carfax report does not may provide the car is in good condition, and a report with accidents does not automatically mean the car is unsafe — it depends on what was damaged and how well it was repaired.
Key Takeaways
- Carfax pulls data from insurance claims, repair shops, and DMV records, so accidents and service work that were never reported to those sources will not appear in the report.
- You can run a Carfax report by entering the VIN on Carfax.com, and the first report usually costs money while additional reports on the same vehicle cost less.
- A Carfax report shows accident history, title problems, odometer readings, and ownership changes, but does not replace a pre-purchase inspection by a mechanic.
- Dealers sometimes provide free Carfax reports as part of their listing, so check whether the report is already available before you pay for one yourself.
How to run a Carfax search by VIN
Go to Carfax.com and look for the search box on the home page. Enter the complete 17-character VIN in the search field and click the button to generate the report. Carfax will pull together all the records it has on file for that vehicle and display them in a single document.
The first Carfax report on a vehicle costs money — the price varies but is typically in the range of $25 to $40 depending on how many reports you buy at once. If you run multiple reports on the same VIN within a short period, Carfax usually charges less for the second and third reports. Some dealers and private sellers post a free Carfax report link with their listing, which saves you the cost if you use that link instead of running your own search.
You do not need to create an account to run a single report, though Carfax will ask for your email address. If you plan to run several reports while shopping for a car, creating an account lets you save reports and compare them side by side.
What information appears in a Carfax report
A Carfax report is organized into sections. The title section shows whether the title is clean, salvage, rebuilt, lemon law buyback, or branded in some other way — this is critical information because a salvage or rebuilt title means the car was declared a total loss by an insurance company at some point. The accident and damage section lists reported collisions, whether they were minor or major, and sometimes includes photos if the repair shop reported them.
The service and repair section shows maintenance records from shops that report to Carfax, including oil changes, brake work, transmission service, and other repairs. This gives you a sense of whether the car was maintained regularly or neglected. The ownership history shows how many owners the car has had and the dates they owned it. The odometer readings section tracks mileage over time and flags any readings that jump backward, which can indicate odometer fraud.
Carfax also shows whether the vehicle was ever reported as a flood vehicle, whether it was used as a rental or fleet vehicle, and whether there are any open recalls. Not all of this information is always available — it depends on what was reported to Carfax by the sources that track the vehicle.
What Carfax does not show you
Carfax reports have real limits. They do not include mechanical condition — a car with a clean Carfax report can still have a failing transmission, worn suspension, or engine problems that have not yet caused a breakdown. They do not show routine maintenance performed at independent shops unless those shops report to Carfax, which many do not. They do not capture accidents that were handled privately between the owner and another driver without involving insurance.
Carfax also does not show whether a car was in a flood unless it was reported to an insurance company or salvage yard. A car that sat in water for days but was dried out and sold privately will have a clean report. Similarly, frame damage from an accident might not appear if the car was repaired at a shop that does not report to Carfax.
For these reasons, a Carfax report should always be paired with a pre-purchase inspection by a mechanic who can physically examine the car, test the brakes and suspension, run a diagnostic scan, and check for signs of past damage that Carfax would not catch.
How to interpret title status in a Carfax report
The title status is one of the most important pieces of information in a Carfax report. A clean title means the car was never declared a total loss and has no major liens or legal holds against it — this is what you want to see. A salvage title means an insurance company declared the car a total loss after damage, usually from an accident, flood, or theft. A car with a salvage title can be repaired and driven, but it will always carry that title, which affects resale value and insurance rates.
A rebuilt title means a car that previously had a salvage title was repaired and passed a state inspection to be put back on the road. Rebuilt-title cars are legal to drive and insure, but they are worth less than comparable cars with clean titles. A lemon law buyback title means the manufacturer repurchased the car from the original owner because of repeated defects — these cars can be resold but must be disclosed as lemon law buybacks.
If you see any title status other than clean, research what caused it and have a mechanic inspect the car thoroughly before you buy. A rebuilt title does not automatically mean the car is unsafe, but it does mean you need to know exactly what was damaged and how it was fixed.
Carfax versus other vehicle history sources
Carfax is the largest vehicle history database, but it is not the only one. AutoCheck is another major provider that pulls from similar sources and sometimes has records Carfax does not. NHTSA.gov (the National Highway Traffic Safety Administration) maintains a separate database of open recalls that is free to search by VIN. Some dealerships and used car sites run their own reports or partner with Carfax to provide free reports as part of their listing.
If you are serious about a car, run reports from both Carfax and AutoCheck — they do not always have identical information, and seeing both gives you a more complete picture. NHTSA's recall database is always worth checking separately because it is the official government source for safety recalls and is updated in real time.
No single report is complete. The most thorough approach is to combine a Carfax or AutoCheck report with a pre-purchase inspection by a mechanic and a check of NHTSA's recall database. This combination catches most problems that matter.
When to run a Carfax report and what to do with the results
Run a Carfax report as soon as you are seriously interested in a specific car — not before, because reports cost money and you will run many searches while shopping. Once you have narrowed your choices to one or two vehicles, pull the reports and review them carefully. If the report shows a clean title, regular maintenance, and no major accidents, that is a good sign. If it shows a salvage title, major collision damage, or long gaps in maintenance, that is a red flag that warrants further investigation or walking away.
Do not let a Carfax report be the deciding factor. Use it to inform your decision, but always have a mechanic inspect the car before you buy. A mechanic can spot frame damage, welding, paint overspray, and mechanical problems that Carfax cannot. If the report shows accidents but the mechanic finds no evidence of damage, that is useful information. If the report is clean but the mechanic finds signs of hidden damage, that tells you something important too.
Keep the Carfax report after you buy the car. It becomes part of your ownership documentation and can be useful if you ever need to prove the car's history for insurance, warranty, or resale purposes.
Frequently Asked Questions
Can I run a Carfax report without the VIN?
No. Carfax requires the complete 17-character VIN to generate a report. You can find the VIN on the driver's side dashboard, the door jamb, the insurance card, or the title document. If you are looking at a car online, the listing usually includes the VIN.
What does it mean if a Carfax report shows multiple owners in a short time?
It can mean the car was flipped by dealers or resellers, or it can mean the owner had life changes that required selling. Multiple owners alone is not a red flag, but combined with accident history or maintenance gaps, it suggests the car may have been neglected or had problems that caused the owner to sell quickly.
Is a Carfax report enough to buy a used car?
No. A Carfax report is one tool, but it does not replace a pre-purchase inspection by a mechanic. Carfax only knows what gets reported to it, and it cannot assess the current mechanical condition of the car. Always have a mechanic inspect any used car before you buy, regardless of what the Carfax report shows.
Can I dispute information on a Carfax report?
Yes. If you believe Carfax has incorrect information about your car, you can contact Carfax directly through their website to dispute the record. Carfax will investigate and correct errors if they find them, though the process can take time.
Do I need to buy a new Carfax report if I am buying from a dealer who already has one?
No. If the dealer provides a free Carfax report with the listing, use that. If you want a more recent report or you are buying from a private seller, you can run your own. One report per car is usually sufficient unless you are checking for updates weeks apart.