CARFAX and AutoCheck Disagree: What to Do When the Reports Don't Match

When CARFAX and AutoCheck disagree, treat the report with the problem as a lead you have to run down, and never let the clean one cancel it out. The two companies buy data from overlapping but different sources, so one can have an accident, auction note, or title event the other never received. Your job is to find out which source reported the event, get paper that confirms or kills it, and have the car inspected with that specific entry in mind.

The usual setup goes like this. One report comes back spotless, the other shows a damage entry or an odometer note, and the seller says the clean one is "the real one." Both are real, and each one is only a list of what that company was told.

Why two reports on the same VIN can differ

CARFAX says its reports draw on billions of records from more than 151,000 domestic and international sources, and its report language talks about accidents "reported to CARFAX." AutoCheck's FAQ says its data comes from hundreds of sources, including state DMVs, auto auctions, Canadian motor vehicle departments, consumer protection agencies, dealers, and other state agencies. AutoCheck also says it reports accident damage when that information is provided to it and may not have every accident. AutoCheck's sample report mentions exclusive auction announcements from two major auctions in its damage section.

Put that together and the gap makes sense. A body shop or insurer might feed one company and not the other. An auction announcement might reach AutoCheck and never touch CARFAX. A police report might land in one database months before the other. None of that means either report is broken. It means each is partial, which the Justice Department's NMVTIS page says about private databases in general: until every entity reports as required, a search can produce a false negative, and the same gaps can exist in private vehicle history databases.

Read the disputed entry like an investigator

Start by pinning down exactly what the two reports disagree about. It's usually one of a few things:

• An accident or damage entry on one report only. Note the date, the location, and the source listed. Then ask the seller directly about that date and place. A real repair often comes with an invoice.
• An odometer reading that doesn't fit. One report may have a reading the other lacks. If a reading sits higher than a later one, you're looking at either a typo at the source or a rollback.
• A title or brand event on one report only. This is the one I'd take most seriously. Brands come from state agencies, and a brand on one report should be checked against NMVTIS and the state title record.
• Different owner counts or use types. Annoying, usually less dangerous, still worth a question. A rental or fleet record on one report changes how hard the car was used.

Also confirm both reports are for the same VIN. It sounds obvious, but if one of the two came from the seller, check it character by character. We've seen seller-supplied report PDFs with the VIN edited, and a one-character change is easy to miss.

Check the government record for title brands

For title brands, NMVTIS is the tiebreaker that matters. The system collects title, odometer, and brand data from state titling agencies, insurers, and salvage and junk yards, and the DOJ says once a state brands a vehicle, that brand becomes a permanent part of its NMVTIS record. If AutoCheck shows a salvage brand and CARFAX doesn't, an NMVTIS report showing the same brand settles which way to lean. Our comparison of NMVTIS versus CARFAX explains what each covers. NMVTIS won't help much with minor accidents, since that's not what it tracks.

Then get the car on a lift

An inspection is the only thing that looks at the metal instead of the paperwork. Hand the shop the disputed entry: "AutoCheck shows front-end damage in March 2022, CARFAX shows nothing." That focus helps. A good tech can check for replaced panels, paint depth differences, and frame repair in the area that entry points to. Our pre-purchase inspection checklist covers what to ask for. And remember that plenty of accidents never show on either report; see does CARFAX show unreported accidents for why.

If one report is simply wrong

Mistakes happen at the source. A wrong VIN typed into a police report or a mis-keyed odometer reading can stick to a car for years. If you own the car, or the seller has documents proving the entry is wrong, ask for a correction. AutoCheck's dispute form asks you to paste the section in question and include the VIN. CARFAX has its own process, which we cover in disputing a CARFAX error. Our broader CARFAX versus AutoCheck coverage comparison walks through what each company tends to catch.

If you're the buyer, though, don't wait for a correction to close the deal. Price the car as if the worse report is true until someone proves otherwise.

Running both is cheaper than one surprise

Honestly, the disagreement is the reason to buy both. We're a licensed reseller of CARFAX and AutoCheck reports, not part of CARFAX, AutoCheck, or Experian, and we never call any report free. Bought direct, each typically lands between $39.99 and $44.99. Our bundle with both has been about $6.75, with single reports around $5.50 for guests and about $4.50 for members, as of November 2026, but confirm at checkout. A coupon site promising both for nothing is usually a subscription signup wearing a costume.

Sources

• CARFAX: Vehicle history reports
• AutoCheck: FAQ (data sources and accident coverage)
• AutoCheck: Dispute form
• AutoCheck: Sample report and glossary
• NMVTIS (U.S. Department of Justice): For consumers