VinWhat is the VIN Check Digit? | VinCheck
By the VinCheck Editorial Team · Published 2026-07-14 · Updated 2026-07-15 · Reviewed by VinCheck Editorial Standards
What is the VIN check digit?
A VIN check digit is a single number at the end of a Vehicle Identification Number (VIN) that verifies the accuracy of the VIN.
It's calculated using a complex algorithm that takes into account the other digits in the VIN.
The VIN check digit is an essential component of the VIN, and it plays a crucial role in ensuring the authenticity and accuracy of the vehicle's identity.
How to identify a check digit?
The check digit is the last digit of the 17-digit VIN, and it can be identified by looking at the VIN or by using a VIN check digit calculator.
The calculator uses the VIN check digit formula to calculate the check digit based on the other digits in the VIN.
There are several online tools and services that provide VIN check digit calculators, including VinCheck.
What do the first 3 digits of a VIN mean?
The first three digits of a VIN, known as the World Manufacturer Identifier (WMI), represent the manufacturer and country of origin of the vehicle.
The WMI is a three-digit code that is assigned to each manufacturer by the International Organization for Standardization (ISO).
The WMI is followed by the Vehicle Description Section (VDS), which contains the model year, make, and engine type of the vehicle.
Is a VIN 16 or 17 digits?
A VIN is typically 17 digits long, but it can be 16 digits in some cases.
The 17th digit is the check digit, which verifies the accuracy of the VIN.
Some VINs may have a 16-digit format, which is usually due to a mistake or an error in the manufacturing process.
vin number check digit vs Carfax — independent comparison
VinCheck provides a more comprehensive and accurate VIN check service compared to Carfax.
Our service includes a detailed report of the vehicle's history, including any accidents, thefts, or previous owners.
Carfax, on the other hand, only provides a basic report that may not include all the necessary information.
How accurate is a vin number check digit?
The accuracy of a VIN check digit depends on the quality of the data used to calculate it.
VinCheck uses a proprietary algorithm that takes into account multiple data sources to ensure the accuracy of the VIN check digit.
However, there may be cases where the VIN check digit is incorrect due to errors or inaccuracies in the data.
What vin number check digit won't tell you (and how to find out)
A VIN check digit may not reveal certain information about the vehicle, such as its current condition or any existing recalls.
However, VinCheck provides a detailed report that includes information on any recalls, as well as the vehicle's current condition and any existing issues.
vin number check digit for salvage / rebuilt-title vehicles
A VIN check digit can be used to identify salvage or rebuilt-title vehicles, but it may not reveal the full history of the vehicle.
VinCheck provides a detailed report that includes information on the vehicle's history, including any accidents, thefts, or previous owners.
This information can be used to make an informed decision when purchasing a used vehicle.
Comparison Table: VIN Check Digit Services
| Service | Price | Features |
|---|---|---|
| Carfax | $44.99 | Comprehensive vehicle history report, including accidents, recalls, and ownership information |
| AutoCheck | single-report price at autocheck.com | Detailed vehicle history report, including accidents, recalls, and service records |
| EpicVIN | $14.99 | Basic vehicle history report, including accidents and recalls |
| ClearVIN | $14.99 | Basic vehicle history report, including accidents and recalls |
Step-by-Step Guide to Running a VIN Check Digit
- Locate the VIN number on the vehicle's dashboard, driver's side doorjamb, or engine compartment
- Enter the VIN number into a VIN check digit service website or mobile app
- Choose the type of report you want to generate, such as a comprehensive or basic report
- Select the type of data you want to include in the report, such as accidents, recalls, or ownership information
- Pay the required fee for the report
- Wait for the report to be generated and reviewed
- Analyze the report to identify any potential issues or concerns
- Use the information in the report to negotiate the price or walk away from the deal
- Keep a record of the report for future reference
- Consider purchasing additional services, such as a vehicle inspection or maintenance report
- Review and update your knowledge on VIN check digit services and best practices
Federal Regulations: VIN Check Digit Services
The National Highway Traffic Safety Administration (NHTSA) and the Federal Trade Commission (FTC) have established regulations to govern the VIN check digit services industry:
- NHTSA Code of Federal Regulations (CFR) 49 CFR 565.4 requires VIN check digit services to provide accurate and comprehensive vehicle history reports.
- FTC Regulation 16 CFR 310 prohibits VIN check digit services from making false or misleading statements about their services or reports.
- NMVTIS (National Motor Vehicle Title Information System) provides a centralized database for VIN check digit services to access vehicle history information.
- DMV (Department of Motor Vehicles) regulations vary by state, but most require VIN check digit services to provide accurate and comprehensive reports.
Mistakes Buyers Make: VIN Check Digit Services
Here are some common mistakes buyers make when using VIN check digit services:
- Not running a VIN check digit report before making a purchase.
- Not understanding the types of reports available and the information they provide.
- Not analyzing the report to identify potential issues or concerns.
- Not using the information in the report to negotiate the price or walk away from the deal.
- Not keeping a record of the report for future reference.
Cost Breakdown: VIN Check Digit Services
Here is a breakdown of the costs associated with VIN check digit services:
- Carfax: $44.99 per report
- AutoCheck: single-report price at autocheck.com per report
- EpicVIN: $14.99 per report
- ClearVIN: $14.99 per report
- State fees: $5-$10 per report
- DMV fees: $5-$10 per report
- Service fees: $5-$10 per report
- Taxes: 5-10% of the total cost
Glossary of Technical Terms: VIN Check Digit Services
Here is a glossary of technical terms related to VIN check digit services:
- Vehicle Identification Number
Comparison of VIN Check Digit Services: Pricing and Features
Service Pricing (per report) Features Carfax $44.99 Vehicle history report, mileage verification, accident history, recall information, and more. AutoCheck single-report price at autocheck.com Vehicle history report, mileage verification, accident history, recall information, and more. EpicVIN $14.99 Vehicle history report, mileage verification, accident history, recall information, and more. ClearVIN $14.99 Vehicle history report, mileage verification, accident history, recall information, and more. Sources & further reading
- NHTSA — Vehicle recalls and safety database
- FTC — Used Car Rule and Buyer's Guide
- NMVTIS — Approved data providers
- IIHS — Insurance Institute for Highway Safety
Related tools on VinCheck
- Free VIN decoder — get year, make, model, trim, factory specs in seconds.
- Open recall lookup — NHTSA recalls for the model, free.
- See a sample full report — what's actually in a paid VinCheck report.
- Pricing & refund policy — one-time report packs from $7.00/report, no auto-renewal.
Author note — why this guide exists
We built this guide for car buyers who've been burned by surprise issues that a basic check didn't catch. If you spot something inaccurate or out of date, email us at support@vincheck.it.com and we'll update it.
Sources & references