CARFAX vs. AutoCheck: Differences and Which to Use

CARFAX and AutoCheck are the two best-known vehicle history reports in the U.S., and both pull from records like title events, reported accidents, odometer readings and registrations. The biggest practical differences: CARFAX is widely known for service and maintenance entries reported by shops, while AutoCheck, from the credit bureau Experian, is known for its score that compares a car with similar vehicles, and for auction-related records.

So which should you use? If you can get both, use both, because neither catches everything, and a record missing from one can appear in the other. If you can only get one, use whichever the seller already provides and then fill the gaps with a free NMVTIS-based title check and an independent inspection. Here's how they compare and how to use them together when you shop in Irvine or around Orange County. For where history reports fit in the full process, see our vehicle history and inspection guide.

Where the data comes from

Neither company inspects cars. They gather records from outside sources and organize them by VIN. Typical sources include:

• State DMVs (title and registration events, title brands)
• Insurance companies (claims and total losses, where reported)
• Police and fire departments (some accident reports)
• Repair shops and dealer service departments (service visits)
• Auctions and fleet or rental companies
• Emissions and inspection stations (odometer readings)

What appears depends on what was reported. A crash fixed privately, paid in cash, at a shop that doesn't share data may never show up on either report.

Side-by-side comparison

Exact features and pricing change over time, so check each company's site for current details.

When CARFAX tends to help more

Because CARFAX often lists service visits, it's useful for judging how a car was maintained. That matters most on vehicles where skipped maintenance gets expensive:

• Turbocharged engines, where oil changes on schedule matter.
• Luxury cars with complex systems, such as the 2017 Jaguar XJ R-Sport we have listed.
• Diesels that need diesel exhaust fluid and regular emissions system care.

You can ask us for the CARFAX on any car we sell. Our article on how to read a CARFAX report walks through the sections and the red flags.

When AutoCheck tends to help more

AutoCheck's score can be handy for quick comparisons, especially if you're weighing several similar cars. Its auction data can also surface a car that went through a dealer or insurance auction, which is worth asking about. A car that went through an insurance auction may have been a total loss, so look for a title brand.

Treat the score as a summary, not a verdict. A good score on a car with an unexplained gap in records still deserves questions.

What neither report can tell you

Even the most complete report leaves gaps:

• Unreported accidents and repairs.
• Current mechanical condition. A report can't tell you about worn brakes, leaking seals or a transmission that's starting to slip.
• Quality of past repairs. "Damage reported" doesn't say whether it was fixed well.
• Open recalls. Check those separately by VIN at https://www.nhtsa.gov/recalls.

That's why history reports are step one, not the last step. An independent mechanic fills in the rest. Our pre-purchase inspection guide explains what a good inspection covers.

A practical way to use both

1. Start with what's free. Get the report the seller provides, and run a free title check through an NMVTIS-approved provider (the list is at https://vehiclehistory.bja.ojp.gov/). Our free VIN check guide has more options.
2. Buy the second report if you're serious. Once a car makes your shortlist, the cost of the other report is small compared with the purchase.
3. Compare them line by line. Look for differences in mileage readings, the number of owners, title events and damage reports.
4. Ask the seller about anything that doesn't match. Real sellers can usually explain a gap or a damage entry.
5. Bring the reports to your inspection. A mechanic who knows a car had front-end damage will look harder at that area.

Red flags to compare across both reports

• Mileage that goes down, or a long gap followed by low miles.
• A title issued in a new state soon after a major storm in the old one.
• Damage reports with "airbag deployed" or "structural damage."
• A pattern of short ownerships.
• Commercial, rental or fleet use, if the seller didn't mention it.

Any one of these can have an innocent explanation. Our guides on odometer rollback and buying a car with accident history cover how to dig in.

Frequently asked questions

Is CARFAX or AutoCheck more accurate?

Neither is complete, and each can include records the other misses. Accuracy depends on what was reported to them. Use both on a car you're serious about, and back them up with an inspection.

Do I still need a history report if the car looks perfect?

Yes. Flood damage, past total losses and odometer problems can be hard to see. A report is a cheap way to catch history that a quick walk-around won't show.

Can a car with a clean report still have been in an accident?

Yes. If an accident wasn't reported to police or insurance and was repaired at a shop that doesn't share data, it may not appear. An inspection can spot signs of past bodywork.

Is an NMVTIS check the same as CARFAX or AutoCheck?

No. NMVTIS-based reports focus on title data, brands and certain insurance and salvage records, often at low cost. They're a useful complement but generally don't include service history.

Does a dealer-provided report count?

It does, as long as it's recent and matches the VIN on the car. Check the date it was run and the VIN on the report.

Shopping in Orange County

Ask us for the CARFAX on any car in our current listings, and pair it with your own checks. You can browse all used cars for sale in Orange County on our site and read more in our California used car buyer rights guide.