CARFAX vs AutoCheck: compare reports before buying

Start with the correct VIN, a current complete report and an independent inspection plan. Use the vehicle-history report comparison worksheet to record what is reported, what differs and what still needs verification. This guide explains how to evaluate reports; it does not claim we tested the providers against a database of known vehicle histories.

What CARFAX says its report can show

CARFAX's own report explanation lists information that can appear, including title brands, odometer readings, accident indicators, total losses, service and repair records, usage and recalls. The key word is reported. The same page says CARFAX does not receive all information and recommends using the report with a pre-purchase inspection and test drive.

Read the detailed events behind a summary. Note the event date, mileage, description and any available source information. If the report mentions damage without explaining the repair, add a question for the seller and inspector rather than supplying your own reassuring explanation.

A service-history gap is an unanswered question. Ask for available invoices and compare their dates, mileage and VIN with the report. Missing entries do not by themselves prove that maintenance was skipped, just as a few entries do not establish that every required service was completed.

What the AutoCheck Score adds to the comparison

Experian's AutoCheck Score explanation presents a score alongside the range for comparable vehicles. Its example shows why a higher raw number on one car is not necessarily a better comparison than a lower number on a different car: the relevant peer ranges can differ.

Read the score together with its comparison range and the underlying report. Treat it as a way to organize further questions, not a mechanical inspection, a repair estimate or proof that every event has been reported. Do not compare two cars solely by the larger number.

Keep the original report available when discussing a concerning event. A screenshot of a summary or score can leave out the details needed for a useful conversation.

Check that you are comparing the same car and date

Match the VIN on the report to the vehicle and relevant ownership documents. Check that the year, model and other identifying details are consistent. Resolve a mismatch before interpreting the history.

Record when each report was generated and which dates its events describe. A report generated earlier is not the same evidence as a newer report, even if both were supplied today. Ask for the complete current document or access through the provider's official channel when a seller supplies only a cropped image.

Our VIN location guide helps you find and compare the identifier. A correct VIN is the starting point; it does not resolve every ownership or condition question by itself.

Compare important events one row at a time

• Title information: write down the exact brand or issue reported and the state or source shown. Use our rebuilt vs. salvage title guide for the separate title decision.
• Odometer history: compare the readings with their dates and ask about a discrepancy rather than averaging conflicting numbers.
• Accident or damage entries: record the description and seek supporting repair records and an inspection that can assess the relevant work.
• Service and use history: separate documented events from missing information and broad seller claims.
• Recall information: use the VIN with NHTSA's recall lookup and read its coverage limits. A history report is not the final answer to every recall question.

Use three labels in your worksheet: reported, separately verified and unresolved. This prevents a long report from looking more conclusive simply because it has more lines.

What if CARFAX and AutoCheck disagree?

First check the VIN, report-generation dates and exact wording. Then identify the specific event that differs. Ask the provider through its official support channel about a suspected error and ask the seller for supporting documents. A blank section in one report does not by itself disprove an event in the other.

For a hypothetical example, one report contains a damage event and another report supplied by the seller has no matching entry. That difference does not establish whether the car was repaired well. Record the unresolved event, obtain available records and ask an appropriate inspection shop what it can assess before you pay.

Do not settle an important conflict by choosing the report with the more attractive summary. If ownership, a title issue or a material repair question remains unresolved, decide what further evidence you need or compare another vehicle.

Should you buy one report or both?

Start with a complete, current report the seller can provide and the actual questions it leaves unanswered. Before paying for another report, check what the provider's current offer includes: the number of vehicles, access period, available updates and total checkout price. Keep a note of the offer date rather than relying on an old price comparison.

A second report may give you another set of reported records to compare, but buying it does not guarantee that a missing event will appear or that a discrepancy will be resolved. Keep enough time and budget for the separate inspection and follow-up records.

Use the report to prepare a better inspection

The FTC's used-car guidance explains that a vehicle-history report is not a substitute for an independent mechanical inspection. Share the complete reports and unresolved questions with the shop. Ask what it can inspect, what requires a specialist and which findings need further diagnosis.

Our inspection checklist helps organize that visit. Choose your next step from the actual evidence, costs and remaining uncertainty, then compare current CarTruvo listings if you need other candidates. CARFAX and AutoCheck are third-party history tools; this guide and its worksheet do not certify a vehicle.