RENAVAM Validator

Check the format and check digit of Brazil's vehicle registration identifier locally, without an official lookup.

Check a RENAVAM

The check runs in your browser. The number is not saved or included in the shared link.

RENAVAM number

Enter 11 digits, or exactly 9 digits for a legacy number. Keep leading zeros. Spaces, dots and hyphens are accepted as separators.

Share only the tool link. The entered number is never included.

Result

Waiting for a number

Type or paste a RENAVAM to check its structure and digit.

The result does not confirm registration, ownership, debts or vehicle authenticity.

Historical references: the 2013 structure and detailed arithmetic in the 2014 manual. This is a mathematical check only.

Frequently asked questions

Where can I find the RENAVAM?

Look for the RENAVAM field on the Brazilian vehicle registration or licensing document, such as the CRLV. Do not use the plate or chassis number.

Why does RENAVAM have 9 or 11 digits?

RENAVAM expanded to 11 digits in 2013. Legacy 9-digit numbers receive two leading zeros. This tool accepts only those two lengths.

Does a matching check digit prove registration?

No. A matching format and digit indicate mathematical consistency only, without confirming registration, ownership or authenticity.

Does the validator query DETRAN or SENATRAN?

No. The calculation runs in your browser without querying registration records, debts, fines or restrictions.

Is the number saved or shared?

No. The number is not saved and the share button copies only the tool link. Reloading clears the input.

What should I do when the RENAVAM digit does not match?

Check every digit and leading zero on the original document. Do not change the check digit by trial and error to obtain a passing result.

About the RENAVAM validator

RENAVAM is Brazil's National Registry of Motor Vehicles identifier. This validator helps detect typing errors using the format and modulo 11 check digit. Validation here is not an official lookup. Legacy 9-digit numbers receive two leading zeros; current numbers have 11 digits.

How to validate a RENAVAM

Enter or paste the number from the document, read the result and notices, then copy the normalized number if needed. The calculation applies weights 3, 2, 9, 8, 7, 6, 5, 4, 3 and 2 to the first ten digits. Remainders 0 or 1 produce a zero check digit; otherwise, the digit is 11 minus the remainder.