RENAVAM

Registro Nacional de Veículos Automotores, the Brazilian vehicle registry number.

Validate

Validates a RENAVAM: the old format (9 digits, left-padded to 11) or the new format (11 digits), with a modulus 11 check digit.

The function ignores spaces, dots, hyphens and slashes, alone or in a run, so every punctuated form is accepted (0063988.4962, 0063988/4962, 00639884-962). Any other character, in particular a letter or an underscore, makes the value invalid. Until 2.4.0 a slash was rejected.
Check digit: the ten base digits, read from right to left, are multiplied by 2, 3, 4, 5, 6, 7, 8, 9, 2 and 3. The digit is the remainder by 11 of ten times the sum, with a remainder of 10 read as 0.
A value whose digits are all the same is rejected.
A number is read only when it is a safe non-negative integer. A negative or fractional number is invalid: 2.4.0 accepted -639884962 and 63988496.2. Strings and non-negative integers give the same result as before.
Portaria DENATRAN nº 27/2013 gives 10 digits and a check digit "calculado através do módulo 11, peso 9". It does not write out the weights, the handling of a remainder of 0, 1 or 10, or how a 9-digit code is read as 11 digits. Those parts follow community references and market practice.
A number loses its leading zeros, so an 11-digit RENAVAM that starts with 0 is only accepted as a string: "08794266580" is valid and 8794266580 is not.
A value that is not a string or a number returns false.

Parameter	Type	Required
`renavam`	`string \| number`	yes
returns	`boolean`

Check if a RENAVAM (Registro Nacional de Veículos Automotores) is valid. Accepts the old format (9 digits) and the new format (11 digits).

Spaces, dots, hyphens and slashes are ignored; any other character makes the value invalid.
A number loses its leading zeros, so an 11 digit RENAVAM that starts with 0 is only accepted as a string: isValidRenavam('08794266580') is true and isValidRenavam(8794266580) is false.
The check digit is the one of Portaria DENATRAN nº 27/2013, art. 1º: "10 dígitos e um dígito verificador, calculado através do módulo 11, peso 9", read as the weights 3, 2, 9, 8, 7, 6, 5, 4, 3 and 2. The portaria gives neither the weights one by one nor the handling of a remainder of 0, 1 or 10, which follow validation-br and brutils; padding a 9 digit code to 11 with zeros is market practice.

import { isValidRenavam } from '@brazilian-utils/brazilian-utils';

isValidRenavam('639884962'); // true (9 digits, old format)
isValidRenavam('00639884962'); // true (11 digits, new format)
isValidRenavam('0063988.4962'); // true (the dot is ignored)
isValidRenavam('12345678901'); // false (invalid checksum)
isValidRenavam('00000000000'); // false (repeated digits)
isValidRenavam('ab00639884962'); // false (letters are rejected)

Source: Portaria DENATRAN nº 27/2013.

Code: brazilian-utils/javascript

Try it with JavaScript isValidRenavam

Shared test cases (39) and the result in each library renavam.isValid

The cases, as JSON

Generate

Generates a valid random RENAVAM in the 11-digit form: 10 base digits plus the check digit.

Parameter	Type	Required
returns	`string`

Generate a valid random RENAVAM in the 11 digit form: ten base digits plus the check digit.

import { generateRenavam } from '@brazilian-utils/brazilian-utils';

generateRenavam(); // '12345678900'

Code: brazilian-utils/javascript

Try it with JavaScript generateRenavam

Shared test cases (1) and the result in each library renavam.generate

The cases, as JSON

RENAVAM

Validate

Generate

Official sources

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