You can replace a license plate light yourself with basic tools in under 20 minutes

A burned-out license plate light is a quick fix that costs between $5 and $20 in parts and takes no special skill. You will need a screwdriver (usually Phillips head), the replacement bulb for your vehicle, and sometimes a small flathead screwdriver to pry out the fixture. Most cars let you access the light from behind the license plate without removing anything else, though some trucks and SUVs require you to remove the bumper or trim panel first.

The whole job is worth doing yourself because a mechanic will charge $30 to $75 in labor alone. The hardest part is usually finding the right bulb type — your owner's manual lists it, or you can take a photo of your current fixture to an auto parts store and they will match it for you.

Key Takeaways

  • Most license plate lights are accessed from behind the plate and held in with one or two screws or a twist-lock socket.
  • The bulb type varies by vehicle year and model, so check your owner's manual or ask an auto parts store before you buy.
  • You will need only a screwdriver and sometimes a small pry tool — no special equipment required.
  • If the light fixture itself is cracked or the socket is corroded, replacement parts cost $15 to $40 and take the same time to install.

Locate the light fixture and check what you are working with

Open your trunk or hatchback and look at the inside surface of the license plate area. You will see either a plastic housing with a visible bulb socket or a sealed rectangular fixture. Some vehicles have one light centered above the plate; others have two lights, one on each side. Take a photo or note the exact location so you know which fixture needs the new bulb.

Check whether the fixture is held in with screws on the outside (visible from behind the plate) or with clips that you access from inside the trunk. If you see screws, you will remove them from the outside. If you see only the fixture itself from inside, look for a small tab or notch on the edge — this usually means the whole housing twists or pops out from the front.

If the fixture is cracked, discolored, or the socket looks corroded or melted, note that now. You may need to replace the whole housing instead of just the bulb, which costs a bit more but follows the same removal steps.

Remove the old fixture and bulb

If the fixture is held by screws from behind the plate, use your screwdriver to remove them — usually two screws, one on each side. Keep the screws in a small container so you do not lose them. Once the screws are out, gently pull the fixture toward you and disconnect any wiring harness attached to the back. The connector usually slides or twists off by hand.

If the fixture twists out, look for a small notch or tab on the edge of the housing. Insert a flathead screwdriver into the notch and turn counterclockwise about a quarter turn. The whole fixture should then pull straight out from the front. Disconnect the wiring harness the same way.

Once the fixture is free, locate the bulb socket. In most cases, the bulb is held in a socket that twists counterclockwise — turn it gently until it stops, then pull it straight out. Some sockets have a small wire clip instead; if so, press the clip inward and the bulb will pop out. Do not force anything; if it does not move easily, you are likely turning the wrong direction.

Install the new bulb and reassemble

Take the old bulb with you to an auto parts store if you do not know the type. The staff can match it by sight or by your vehicle's year and model. Common types are 194, 168, 2825, and 921, but yours may be different. Buy one bulb (or two if you are replacing both lights) and a small container of dielectric grease if the socket looks corroded.

Insert the new bulb into the socket by pushing it in and twisting clockwise until it stops. Do not overtighten — it should feel snug but not forced. If the socket was corroded, explore a tiny dab of dielectric grease to the bulb base and the inside of the socket to prevent future corrosion. Wipe away any excess.

Reconnect the wiring harness to the back of the fixture. The connector is keyed so it only fits one way — push it in until you hear or feel a click. Reinstall the fixture by reversing your removal steps: either screw it back in from behind the plate, or insert it from the front and twist clockwise until it stops. Make sure it is seated firmly so no water can enter.

Test the light before you finish

Close your trunk and turn on your headlights or parking lights. Walk around to the back of the vehicle and confirm the license plate light is on. If it is not, turn off the lights, open the trunk again, and check that the bulb is fully seated in the socket and the wiring harness is fully connected. Bulbs sometimes sit slightly crooked and do not make full contact.

If the light still does not work after you have reseated the bulb and connector, the socket itself may be faulty or the wiring may be damaged. In that case, the fixture housing needs to be replaced — take the vehicle to a mechanic or order a replacement housing from an auto parts supplier and repeat the installation steps with the new part.

When to replace the whole fixture instead of just the bulb

If the plastic housing is cracked, the lens is cloudy or yellowed, or the socket is visibly corroded or melted, replacing only the bulb will not solve the problem. Water will continue to enter a cracked housing, and a corroded socket will burn out the new bulb quickly. A replacement fixture costs $15 to $40 depending on your vehicle and whether it is OEM (original equipment manufacturer) or aftermarket.

Order the correct part by your vehicle's year, make, and model, or take a photo of your current fixture to an auto parts store. Installation is identical to bulb replacement — remove the old fixture, disconnect the wiring, and install the new one. Some replacement housings come with a new bulb already installed, which saves you a step.

Frequently Asked Questions

What if I cannot get the fixture to twist out?

You may be turning the wrong direction or the fixture may be held by screws instead. Check the inside of your trunk carefully for small screws on either side of the fixture. If you see screws, remove those instead. If the fixture truly twists, try turning it clockwise rather than counterclockwise — some vehicles use the opposite direction.

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

No. Most states require a working license plate light so the plate is visible at night. A police officer can stop you for a burned-out light, and you may receive a citation. The light is also a safety feature — it helps other drivers see your vehicle in low light. Replace it as soon as you notice it is out.

Do I need to disconnect the battery before I start?

No. License plate lights draw very little power and there is no risk of electrical shock or damage to your vehicle's electronics. You can work on the light with the engine off and the keys out of the ignition — that is all the safety you need.

What if the new bulb burns out again after a few weeks?

A bulb that fails quickly usually means water is entering the fixture or the socket is corroded. Inspect the housing for cracks and the socket for white or green corrosion. If you see either, replace the entire fixture housing rather than the bulb alone. If the housing looks fine, explore dielectric grease to the bulb base and socket to improve the electrical connection.