How to Check a Used Car’s History Before Buying: VIN Reports Explained
Author: Eleanor Shelby, Posted on 5/7/2025
A person standing in front of a computer, entering a car's VIN number into a website, with a report displayed on the screen

Major Vehicle History Report Providers

When considering a used car, it is essential to review a detailed VIN report from reputable providers. Each provider offers unique features, with variations in data, sources, and pricing.

Carfax

Carfax is among the best-known names for vehicle history reports in the United States. Carfax reports offer extensive information, including accident history, service and maintenance records, previous ownership details, odometer readings, and title information.

Many dealerships and private sellers provide a Carfax report as part of the sales process. The data that Carfax uses comes from thousands of sources, like DMVs, auto auctions, service shops, and insurance companies.

This helps buyers quickly spot major concerns such as branded titles, past accidents, and the number of previous owners. A Carfax report can also show whether a car was ever used as a fleet vehicle, rental, or in a government fleet, which may affect the car’s value and condition.

Users need the vehicle’s 17-digit VIN to access the report. Reviewers often suggest using Carfax before purchase due to the depth and breadth of its reporting, as described by Car and Driver.

AutoCheck

AutoCheck is a direct competitor to Carfax and is best known for its unique AutoCheck Score, which allows shoppers to compare the histories of multiple vehicles quickly. This score ranks a car’s history relative to similar vehicles based on factors like past accidents, title status, and mileage.

Many dealerships use AutoCheck, especially for auction vehicles. AutoCheck pulls data from similar sources as Carfax but has a stronger emphasis on auction records and dealer transactions.

It is often used by large auto auctions and offers unlimited report packages, which can be cost-effective for shoppers researching several cars. Several experts note that AutoCheck is especially useful for quickly identifying issues such as odometer rollbacks or severe accidents that might go unreported elsewhere.

For buyers concerned about price and value, AutoCheck can be a favorable alternative, as highlighted by Edmunds.

NMVTIS Vehicle History Reports

The National Motor Vehicle Title Information System (NMVTIS) is a government-run database designed to prevent fraud and protect consumers from unsafe vehicles. NMVTIS vehicle history reports include information on current and previous titles, odometer readings, brands (such as salvage or flood), and the status of the vehicle’s title.

What sets NMVTIS apart is its legal mandate—all states, insurance companies, and junk or salvage yards are required to submit data to NMVTIS. This makes it a highly reliable source for identifying branded or totaled vehicles, even before the data might appear in other reports.

NMVTIS vehicle history reports are typically more affordable but may not contain service or maintenance records provided by private companies. Buyers obtain NMVTIS reports through approved providers, making it a valuable tool for confirming legal and safety status of any used car, as explained by KBB.

Key Information Found in a VIN Report

A hand holding a tablet with a VIN report displayed on the screen, while a car sits in the background

VIN reports help buyers make informed choices by revealing past accidents, recorded title statuses, and detailed histories of repair or maintenance. Reviewing these records can safeguard against unexpected issues and costs when purchasing a used car.

Accident and Damage History

A VIN report lists any recorded accidents or physical damage a vehicle has experienced. It covers incidents such as collisions, flood damage, hail damage, and severe weather impacts.

This information is pulled from insurance claims, police reports, and body shops, giving a more complete view of the car’s history. Key details include the type and severity of past accidents, airbag deployments, and if the car has ever been labeled a “total loss” by an insurance provider.

Some VIN reports will also note the locations of damage, like frame or structural impact. This transparency is crucial for buyers concerned about lingering safety or repair issues.

Even if a repaired car appears fine during inspection, undisclosed or repeated damage can reduce its market value and reliability. Reviewing accident and damage history helps avoid hidden costs and safety problems.

For more on what accident histories include, visit this vehicle history reports overview.

Title Information

Title information recorded in a VIN report verifies ownership and exposes any problems with the car’s legal status. It includes any changes in ownership, such as if the car was ever a salvage title, rebuilt, or branded as junk.

These records are especially important because they flag vehicles that have been totaled or written off by insurers, even if they were repaired and returned to the road. Title records reveal if a car has been stolen, recovered, declared as flood damaged, or listed as a lemon.

Each designation can affect insurance rates, vehicle value, and the owner’s ability to register it. Cars with “clean” titles typically represent fewer risks.

However, buyers should look closely for title brands that signal past issues. Consistent title transfers and clear history suggest smoother ownership experiences.

For a closer look at title information and related legal history, see these key insights for buying used cars.

Service and Maintenance Records

VIN reports often include a timeline of service and maintenance records collected from dealerships, service centers, and manufacturer recalls. These records document regular oil changes, brake work, tire rotations, and major repairs, revealing if a car has been properly maintained over its lifetime.

Service histories are critical for assessing long-term reliability. A well-documented maintenance record can point to fewer unexpected repairs and longer vehicle life.

Look for entries showing routine maintenance, major service milestones, and any recurring mechanical issues or recalls. Gaps in maintenance history could mean neglected care or missed recalls, both of which can affect future performance and safety.

If a report lacks details, buyers may want to request documentation from prior owners or servicing shops. Review the full scope of what can appear on a report at this vehicle history report guide.