How accidents show up on Carfax and AutoCheck

Owners usually look at a history report for the first time when an adjuster mentions it, or when a dealer quotes a trade-in figure. This guide explains where the accident entry came from and what its wording does and does not tell you. How a reported accident changes what buyers pay is a separate question, covered in how accident history affects resale value.

Where accident records come from

Neither company sees the car. Each report is a collection of records sent in by other organizations, matched to the vehicle identification number (VIN).

• Carfax says it receives accident information “from thousands of sources,” but that “not every accident or damage event is reported and not all reported are provided to CARFAX.” Its support page invites owners who have a police report or repair order to submit it so it can be added.
• AutoCheck, an Experian product, lists its data sources as state departments of motor vehicles, auto auctions, consumer protection agencies, auto dealers and other state agencies. Its FAQ says it “reports on accident damage when that information is provided to it” and “may not provide information on every accident.”

The practical result is that two reports on the same car can differ. One may show an accident the other does not, or show it with a different date or less detail. Neither report is the official record of the accident. The police report, the insurer’s claim file and the repair invoice are.

What “minor”, “moderate” and “severe” mean on Carfax

Carfax’s published glossary defines three damage severity levels:

The same glossary treats structural damage as a separate idea. It defines it as damage to “the main structure or any component designed to provide structural integrity of the vehicle,” and adds that “all levels of accidents, from minor to severe, can cause structural damage.” So a “minor” label does not rule out frame or unibody repair, and a structural entry does not mean the accident was rated severe.

Carfax also says that “in some cases” the report includes severity information, and that when the information is available it shows whether air bags deployed and whether the vehicle could be driven. It notes that different states report different amounts of information after a crash, and that older crashes often carry less detail. A report with no severity label is common and does not mean the damage was light.

AutoCheck’s FAQ describes the kinds of records it reports but does not set out a severity scale like Carfax’s. Read the wording on the AutoCheck report itself.

Who decides the label

The severity level is the report company’s category. Carfax’s glossary describes the three levels but does not explain how a particular record is placed in one. The label is not your insurer’s assessment, it is not the shop’s, and it is not an appraisal. Two things follow:

• A label can understate the repair. An entry marked “minor” can still sit on top of an invoice with structural labor, a replaced air bag or an ADAS calibration.
• A label can overstate it. If you think it does, the repair invoice is the evidence, and our guide on correcting a vehicle history report explains how to raise it.

For a diminished value claim, the invoice controls, not the label. Our guides on how bad frame damage is and minor accidents and cosmetic damage explain how to read what was actually done.

Why an accident can appear months later

Records reach a report when a source sends them, and sources send them on their own schedules. Carfax’s glossary says that “as details about the accident become available, those additional details are added” to the report. In practice, that means:

• an accident can appear before the repair is finished, with little detail;
• more detail, or a second entry from a different source, can be added later;
• an accident that does not appear now can still appear later, after you have sold the car or settled a claim.

If an adjuster says there is no loss in value because the accident is not on Carfax, two points answer it. Not every accident is reported, by the report company’s own statement, and buyers also learn about repairs through inspections, paint readings and seller disclosure. A record that is missing today is not a promise that the car will always sell as clean. Insurers raise this and other objections; see why insurers deny or reduce diminished value claims.

NMVTIS is a different kind of report

The National Motor Vehicle Title Information System (NMVTIS) is a federal title database, not a commercial history report. The Department of Justice describes it as covering a vehicle’s title, most recent odometer reading, brand history and, in some cases, theft data, drawn from state titling agencies, auto recyclers, junk and salvage yards, and insurance carriers.

A repaired car that was never totaled or branded will usually look clean on NMVTIS even when a commercial report shows the accident. Our guide on how to tell if a car has frame damage covers what each source can and cannot show for structural repairs.

What to do with this in a claim

• Run a current report once repairs are finished, so you see what a buyer will see.
• Keep the final repair invoice and supplements. They show the work in detail, which no report label does.
• Tell your appraiser about any earlier accident, reported or not. Our guide on prior accidents and second claims explains why.

A diminished value appraisal works from the repair records and the market for comparable vehicles, not from the report label. Send the invoice for a free claim review. If you order, a typical appraisal is $250–$350; the report supports your claim and does not guarantee a payment. Autoloss is not affiliated with or endorsed by CARFAX, AutoCheck or Experian. Their names are used only to identify their reports.