What a Brazilian license plate looks like and what each part means

A Brazilian license plate is a white rectangle with black text, measuring 380 mm wide by 130 mm tall. The format changed in 2018 when Brazil introduced the Mercosul standard, which is now used for all new vehicle registrations. The older format, still seen on older vehicles, used seven characters: two letters, five numbers. The new Mercosul format uses nine characters: three letters, one number, two letters, two numbers.

Reading a Mercosul plate from left to right, the first three letters identify the state where the vehicle was registered. The first number after those letters is not a state code—it is a sequential digit that helps track registration batches. The next two letters are part of the national registration sequence. The final two numbers complete the unique identifier for that specific vehicle. This system allows Brazil to register far more vehicles than the old format could handle.

The blue stripe on the left side of the plate displays the Mercosur flag (a symbol of the South American trade bloc) and the country code "BR". This blue stripe is standard across all Mercosul plates in member countries, making Brazilian plates visually consistent with those from Argentina, Paraguay, and Uruguay.

Key Takeaways

  • Brazilian license plates changed to the Mercosul format in 2018, adding two more characters and changing the layout to three letters, one number, two letters, two numbers.
  • The first three letters on a plate indicate which Brazilian state issued the registration, not the owner's current location.
  • Older plates with two letters and five numbers are still legal and seen on vehicles registered before 2018, but all new registrations use the Mercosul format.
  • The blue stripe with "BR" on the left side of every Brazilian plate identifies it as a vehicle registered in Brazil and part of the Mercosur trade agreement.

How state codes work on Brazilian plates

The first three letters on a Brazilian plate correspond to the state where the vehicle was registered with the Departamento Estadual de Trânsito (DETRAN), the state traffic authority. São Paulo uses "SP", Rio de Janeiro uses "RJ", Minas Gerais uses "MG", and so on. This is similar to how U.S. state abbreviations appear on American plates, except Brazil uses three letters instead of two.

The state code does not change if you move to a different state. If you buy a used car registered in São Paulo and move to Bahia, the plate still shows "SP". To change it to a Bahia plate, you would need to re-register the vehicle with the Bahia DETRAN, a process that involves transferring ownership documents and paying state fees. Most vehicle owners keep their original state plates unless they are moving permanently and plan to stay in the new state long enough to justify the cost and paperwork.

This system means you cannot determine where a car's owner currently lives just by looking at the plate—only where it was originally registered. On Brazilian roads, you will see plates from every state, reflecting both permanent residents and people who have relocated but kept their original registration.

Differences between the old and new plate formats

Vehicles registered before 2018 carry the older format: two letters followed by five numbers (for example, "SP-12345"). This format was in use from 1990 until the Mercosul transition began. The old plates are still completely legal and do not need to be replaced unless the plate is damaged or the vehicle changes ownership in some states.

The transition to Mercosul plates happened gradually. Brazil began issuing new Mercosul plates in 2018 but did not make them mandatory for existing vehicles. Vehicle owners can voluntarily exchange an old plate for a new Mercosul plate, but there is no requirement to do so. When a vehicle changes ownership or is re-registered for any reason, the new plate issued will be in Mercosul format.

The main practical difference is that the Mercosul format allows Brazil to register significantly more vehicles without running out of unique combinations. The old format could theoretically produce 26 × 26 × 99,999 combinations (roughly 67 million per state). The new format produces 26 × 26 × 26 × 9 × 26 × 26 × 99 combinations (roughly 4 billion per state), giving the system room to grow for decades.

How to read the registration year from a Brazilian plate

Unlike some countries, Brazilian license plates do not display the registration year directly on the plate itself. The year a vehicle was registered is recorded in the DETRAN database and on the vehicle's registration document (Certificado de Registro e Licenciamento do Veículo, or CRLV), but not printed on the plate.

You can estimate roughly when a vehicle was registered by its plate format: if it has two letters and five numbers, it was registered before 2018. If it has the Mercosul format (three letters, one number, two letters, two numbers), it was registered in 2018 or later. However, this is not precise, because owners can keep old plates and some states took longer to transition than others.

The only way to find the exact registration year is to check the vehicle's official documents or contact the DETRAN office in the state where the plate was issued. The registration year matters for insurance, emissions testing, and determining when the vehicle's annual inspection is due.

What the colors and markings on a Brazilian plate mean

Standard Brazilian plates are white with black text. The blue stripe on the left contains the Mercosur symbol and "BR" in white text. This blue stripe is now standard on all new Mercosul plates and helps identify Brazilian vehicles at a glance, especially when traveling in other Mercosur countries.

Some Brazilian vehicles display different colored plates for specific purposes. Taxis in many cities have yellow plates with black text to make them when ready recognizable. Diplomatic vehicles and government vehicles may have different formats or colors. Temporary plates, issued when a vehicle is being transported or during the registration process, are usually white with red text and are valid for a limited time only.

The standard white plate with black text is what you will see on the vast majority of privately owned vehicles on Brazilian roads. The size and positioning of the plate are regulated by DETRAN to may support consistency and readability for traffic enforcement cameras and toll systems.

How Brazilian plates connect to vehicle registration and inspection

A Brazilian license plate is tied to a specific vehicle's registration record in the DETRAN system. When you register a vehicle, you receive a plate and a registration document (CRLV). The plate number, vehicle identification number (VIN), and owner information are all linked in the state database.

Every year, vehicle owners must renew their registration and pass an emissions inspection (Inspeção Veicular). The renewal sticker or proof of inspection is often displayed on the plate itself or on the windshield, depending on the state. Some states use a colored sticker on the plate to show the inspection month; others use a digital system. When you see a plate with a colored sticker, that sticker indicates when the vehicle's next inspection is due.

If a vehicle is involved in a traffic violation, accident, or theft, the plate number is recorded in the DETRAN database and linked to the vehicle's history. This record follows the plate even if the vehicle changes owners, which is why checking a vehicle's history before buying it is important.

Frequently Asked Questions

Do I need to change my old plate to a Mercosul plate?

No, changing is voluntary. Old plates remain legal and do not need to be replaced unless the plate is damaged or the vehicle is re-registered. When you sell the vehicle or re-register it for any reason, the new plate issued will be in Mercosul format.

Can I tell where a car owner lives by looking at the plate?

No. The first three letters show only where the vehicle was originally registered, not where the owner currently lives. Owners can move to different states and keep their original plates indefinitely.

What do the numbers and letters on a Mercosul plate represent?

The first three letters are the state code. The first number is a sequential batch identifier. The next two letters are part of the national registration sequence. The final two numbers complete the unique vehicle identifier. Together, these nine characters create a unique registration number for that vehicle.

Why did Brazil change to the Mercosul plate format?

The old format could only produce about 67 million unique combinations per state. The Mercosul format produces roughly 4 billion combinations per state, allowing Brazil to register far more vehicles as the population and vehicle ownership grow.

What does the blue stripe on the left side of the plate mean?

The blue stripe displays the Mercosur trade bloc symbol and "BR" to identify the vehicle as registered in Brazil. This stripe is standard on all Mercosul plates and helps identify Brazilian vehicles when traveling in other South American countries.