You can replace a license plate light yourself with basic tools and a replacement bulb

A burned-out license plate light is a quick fix that takes 15 minutes and costs $5 to $15 for the bulb. You do not need a mechanic — the job requires only a screwdriver, possibly a socket wrench, and the correct replacement bulb for your vehicle. Most states require a working license plate light for nighttime driving, so replacing it promptly keeps you legal and avoids a ticket.

The exact steps depend on whether your vehicle has a single bulb housing or separate fixtures on each side of the plate. Either way, the process is the same: locate the housing, remove it, swap the bulb, and reinstall. This guide walks you through both setups so you know what to expect before you start.

Key Takeaways

  • License plate light bulbs typically cost $5 to $15 and are sold at auto parts stores, big-box retailers, and online — check your owner's manual or the current bulb for the exact type.
  • Most vehicles have the housing mounted directly behind the license plate with two or four screws holding it in place; removing these screws gives you access to the bulb.
  • The bulb itself usually twists out counterclockwise or pulls straight out depending on the socket type — check your manual if you are unsure which motion your vehicle uses.
  • A working license plate light is required by law in all 50 states for nighttime driving, so a burned-out bulb can result in a traffic stop and fine.

Identify your license plate light type before you buy a bulb

Your owner's manual lists the exact bulb type — look for "license plate light" or "rear marker light" in the index. If you do not have the manual, check the current bulb itself: most bulbs have the type stamped on the base (common types are 194, 168, 921, or 3157). Write down the number and bring it to an auto parts store, or search your vehicle's year, make, and model online to confirm.

Some vehicles use LED license plate lights that do not have a replaceable bulb — the entire housing must be swapped out. If you remove the housing and see no bulb socket, or if the housing is sealed, this is likely your situation. In that case, you will need to order a replacement housing assembly and follow the same removal steps, then install the new one in reverse.

Locate and remove the license plate light housing

The housing is mounted directly above or below your license plate, usually with two or four Phillips-head or flathead screws. Park in a well-lit area or use a flashlight to see the screw heads clearly. Some housings are held by a single bolt instead of screws — check before you assume you need a screwdriver.

Remove the screws or bolt and gently pull the housing away from the vehicle. Do not yank hard; the housing may still be connected by a wire or clip. If it does not come free easily, check for a wire connector on the back and disconnect it by pressing a small tab or pulling gently. Once the housing is free, set the screws in a small container so you do not lose them.

Remove the old bulb and install the new one

Inside the housing, you will see the bulb in a socket. Most bulbs twist counterclockwise to remove — grip the bulb gently and turn it about a quarter turn until it releases. Some bulbs pull straight out without twisting; if twisting does not work, try pulling gently. Do not force either motion; if the bulb resists, stop and check your manual to confirm the correct removal method for your vehicle.

Once the old bulb is out, insert the new bulb into the socket. If it twists, turn it clockwise until it clicks or stops turning. If it pulls in, push it straight in until it seats fully. The bulb should be snug but not tight — you should not need to force it. Do not touch the glass part of the new bulb with your bare fingers; oils from your skin can shorten the bulb's life.

Reinstall the housing and test the light

Slide the housing back into place and align the screw holes with the mounting points on the vehicle. Insert the screws and tighten them by hand first, then use your screwdriver to snug them down. Do not over-tighten; you only need them tight enough that the housing does not move. If the housing has a wire connector, plug it back in before you fully seat the housing.

Turn on your headlights or have someone stand behind the vehicle to confirm the license plate light is now on. If it is not, turn off the headlights, remove the housing again, and check that the bulb is fully seated in the socket. Reinstall and test once more. If the light still does not work, the socket itself may be damaged — in that case, you will need to replace the entire housing assembly.

What to do if the light still does not work after replacement

If the new bulb does not light up, the problem is usually a loose connection or a damaged socket. Remove the housing again and inspect the socket for corrosion, cracks, or bent contacts. If you see corrosion (a white or green crusty buildup), gently clean the socket contacts with a dry cloth or a pencil eraser, then reinstall the bulb and test again.

If the socket is cracked or the contacts are bent, the housing assembly needs to be replaced. Order a new housing assembly for your vehicle's year, make, and model, then remove the old one and install the new one using the same steps. If you are not confident doing this yourself, a mechanic can complete the job in under 30 minutes for a service fee that typically ranges from $50 to $150, depending on your vehicle and location.

Frequently Asked Questions

Do I need to disconnect the battery before replacing the bulb?

No. License plate lights draw very little power and pose no shock risk. You can safely replace the bulb with the battery connected and the vehicle off. If you are uncomfortable working near electrical components, disconnecting the negative battery terminal takes 30 seconds and adds no risk.

What if I cannot find the screws holding the housing?

Some housings use clips instead of screws, or the clips are hidden under a trim piece. Check your owner's manual for the exact mounting method. If the manual is not available, try gently prying the housing edge with a plastic trim tool or old credit card to see if it pops free. Avoid metal tools that can scratch the paint.

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

Technically, no — all 50 states require a working license plate light for nighttime driving. A police officer can stop you for it and issue a citation. The fine varies by state but typically ranges from $20 to $100. Replacing the bulb takes 15 minutes, so it is worth doing right away.

How long does a license plate light bulb last?

Traditional incandescent bulbs last 500 to 1,000 hours of use, which usually means two to five years depending on how often you drive at night. LED bulbs last much longer — often 10 years or more. If your bulb burned out very quickly, the socket may be damaged or the circuit may be drawing too much power; have a mechanic inspect it.