License plate bulbs are straightforward to replace yourself in most vehicles

A burned-out license plate bulb takes five to fifteen minutes to fix and costs between $5 and $20 for the replacement bulb. You do not need a mechanic. The job requires only a screwdriver (usually Phillips head) and the correct bulb type for your vehicle. In most states, a non-working license plate light is a traffic violation that can result in a ticket, so replacing it promptly keeps you legal on the road.

The exact steps depend on whether your vehicle has a traditional bolt-on license plate frame or a newer integrated design, but the principle is the same: access the housing from behind the plate, remove the old bulb, and install the new one.

Key Takeaways

  • Most license plate bulbs can be replaced from behind the plate without removing it, using only a screwdriver.
  • You need to know your vehicle's year, make, and model to buy the correct bulb type—common types include 194, 168, and 921.
  • The bulb housing usually twists out counterclockwise or is held by a single screw; check your owner's manual for your specific vehicle.
  • A burned-out license plate light is illegal in most states and can result in a traffic stop or citation.

Find the correct bulb type for your vehicle

Your owner's manual lists the exact bulb number you need. If you do not have the manual, search online for "[your year, make, model] license plate bulb" and you will find the part number. Common types are 194, 168, 921, and 3157, but your vehicle may use a different one.

When you buy the bulb, bring the part number with you or order it online. Bulbs are inexpensive and sold at auto parts stores, big-box retailers, and online. Buy two if you can—if one bulb burned out, the other is likely aging and may fail soon.

Access the bulb housing from behind the license plate

Park on a level surface and turn off the engine. Open your trunk or hatchback if your license plate is on the rear (most are). Look at the back of the license plate frame. You will see either a plastic or metal housing with one or two small compartments—these hold the bulbs.

On some vehicles, you can access the housing without removing the plate. On others, you may need to unbolt the plate from the frame. Check your owner's manual first. If you do remove the plate, note which way it faces so you reinstall it correctly.

Remove the old bulb and install the new one

The bulb housing usually twists out counterclockwise by a quarter turn. Grip the housing firmly and rotate it away from you. If it does not move, look for a small screw holding it in place—remove the screw with your screwdriver and the housing will come free.

Once the housing is out, the bulb pulls straight out. It may be a straightforward push-in type or a bayonet type that twists slightly. Insert the new bulb the same way the old one came out—straight in for push types, or in and twist clockwise for bayonet types. Push or twist until you feel it seat firmly.

Reinstall the housing by twisting it clockwise until it stops, or by replacing the screw if there was one. Do not overtighten—you only need it snug enough that it will not rattle.

Test the light before you drive

Turn on your headlights or parking lights (depending on when your license plate light comes on—check your manual if you are unsure). Walk around to the rear and confirm the light is working. If it is not, the bulb may not be seated correctly. Remove the housing again, reseat the bulb, and test once more.

If the light still does not work after you have reseated the bulb, the housing socket itself may be damaged or corroded. This is rare, but if it happens, you will need to have the housing replaced—this is a job for a mechanic or dealership.

When to replace both bulbs at once

License plate lights usually come in pairs (one on each side of the plate, or one on each side of the vehicle). If one bulb has burned out, consider replacing both. Bulbs age together, and replacing both now means you will not have to do this job again in a few weeks when the second one fails.

The cost of two bulbs is minimal compared to the time and effort of doing the job twice. Most people find it worth the small extra expense.

Why your license plate light matters legally

In all 50 states, a working license plate light is required. Police can stop you for a burned-out plate light, and you can receive a citation. The fine varies by state but is usually between $20 and $100. Replacing the bulb takes less time than a traffic stop, so it is worth doing as soon as you notice it is out.

If you are not sure whether your light is working, turn on your headlights at dusk and walk to the back of your vehicle. You should see the plate clearly lit. If you cannot read the numbers, the bulb is burned out or very dim.

Frequently Asked Questions

Can I drive with a burned-out license plate light?

Legally, no. A non-working license plate light is a traffic violation in all states. You can be stopped and cited. The bulb is inexpensive and takes minutes to replace, so it is best to fix it before driving again.

What if I cannot get the housing to twist out?

Stop and check your owner's manual—your vehicle may have a screw instead of a twist-out design. If there is a screw, remove it with a screwdriver. If you still cannot access it, a mechanic can help, but this is uncommon on modern vehicles.

Do I need to remove the license plate to replace the bulb?

Usually not. Most vehicles allow you to access the bulb housing from behind the plate without unbolting it. Your owner's manual will confirm this for your specific model. If you do remove the plate, take a photo first so you know which way it faces when you put it back.

How often do license plate bulbs burn out?

Most bulbs last several years, but it depends on how often you drive and the quality of the bulb. If your bulb burned out very quickly, you may have a wiring issue—a mechanic can check this if it happens repeatedly.

What is the difference between the bulb types like 194 and 168?

They are different sizes and wattages. Using the wrong type may not fit the socket or may be too bright or dim. Always use the type listed in your owner's manual or on the old bulb itself—the part number is usually printed on the base.