License plate lights are replaceable bulbs you can swap yourself in most cars

Your license plate lights are small bulbs mounted in the housing above or below your rear license plate. They illuminate the plate so police and cameras can read it at night. When one burns out, you can replace it yourself in most vehicles — it takes five to ten minutes and costs between $5 and $20 for the bulb.

The job is straightforward because the bulb sits in a socket you can access from behind the light housing. You do not need to remove the plate itself or take the car to a shop. The only tools you typically need are a screwdriver (sometimes) and your hands.

Key Takeaways

  • License plate light bulbs are standard replacements you can buy at any auto parts store, and the part number is printed in your owner's manual or on the housing itself.
  • Most housings unscrew from the outside or pop out from behind the bumper, and the bulb twists or pulls straight out once the housing is open.
  • Check your owner's manual first because some vehicles require removing trim or accessing the light from inside the trunk, which changes the difficulty.
  • If the housing is cracked or the socket is corroded, replacement costs more because you need a new housing assembly rather than just a bulb.

Locate the bulb type and part number before you start

Open your owner's manual and search for "license plate light" or "rear light bulb." The manual will list the exact bulb type — usually something like 194, 168, 921, or 912. Write down that number before you go to the store.

If you cannot find the manual, look at the light housing itself. Many housings have the bulb type printed on the back. You can also photograph the housing and take it to an auto parts store; staff can identify the bulb from the photo. Buy one bulb as a spare — they are cheap and burn out without warning.

Remove the light housing from your vehicle

Park on level ground and turn off the engine. Walk to the rear of the car and look at the light housing. Most housings are held in place by one or two screws on the outside, or they snap into clips and pull straight out from behind.

If you see screws, use a Phillips or flathead screwdriver (whichever fits) to remove them. If you do not see screws, try gently pulling the housing straight toward you — it should pop out. Some vehicles require you to open the trunk and access the housing from inside; check your manual if pulling from outside does not work.

Once the housing is loose, gently pull it away from the car. You may need to angle it slightly to clear the bumper or trim. Do not force it — if it catches, look for a clip or screw you missed.

Twist or pull the old bulb out and install the new one

Look inside the housing. You will see a socket with the bulb inserted into it. The bulb either twists counterclockwise (like a light bulb in a lamp) or pulls straight out. Try twisting first — if it does not move, pull gently straight out.

Once the old bulb is out, insert the new bulb into the socket. If it twists in, turn it clockwise until it stops — do not force it. If it pushes in, slide it straight in until you feel it seat. The bulb should sit flush with the socket, not sticking out.

Before you reinstall the housing, turn on your headlights to test the new bulb. If it lights up, you are done. If it does not, the bulb may not be seated correctly — remove it and try again.

Reinstall the housing and check both lights

Slide the housing back into place. If it has screw holes, align them with the holes in the car and reinstall the screws. Tighten them by hand first, then use the screwdriver to snug them down — do not over-tighten, or you may crack the plastic housing.

If the housing snaps in, push it firmly until you hear or feel it click into place. The housing should sit flush against the car with no gaps.

Turn on your headlights again and walk around to the rear to confirm both license plate lights are working. If one is still out, you may have a socket problem or a wiring issue — see the troubleshooting section below.

What to do if the housing is damaged or the bulb will not stay in

If the plastic housing is cracked, water can get inside and corrode the socket. A corroded socket will not hold a bulb securely, and the bulb may flicker or not light at all. In this case, you need to replace the entire housing assembly, not just the bulb.

Housing assemblies cost between $20 and $60 depending on your vehicle. You can buy them at auto parts stores or online. Installation is the same as bulb replacement — remove the old housing and screw or snap the new one in place.

If the bulb twists in but spins freely without tightening, the socket threads are stripped. This also requires a new housing. Do not force a bulb into a stripped socket — you will break the bulb inside the housing and make the problem worse.

Why license plate lights matter for safety and legal reasons

A burned-out license plate light is a safety issue because it makes your car harder to see and identify at night. Police and traffic cameras cannot read your plate in the dark without that light, which means a hit-and-run or traffic violation could go unrecorded.

In most states, a burned-out license plate light is a minor traffic violation. An officer can pull you over for it, though they usually cite it only if they stop you for another reason. The fine is typically $20 to $50, which is more than the cost of the bulb.

More importantly, a working license plate light helps other drivers see your car at night, especially when you are backing up or parked on a dark street. It is a small thing that contributes to overall road safety.

Frequently Asked Questions

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

Technically you can, but you should not. It is a traffic violation in most states, and it reduces visibility at night. Replace the bulb as soon as you notice it is out — the job takes ten minutes and costs less than a traffic ticket.

What if I replace the bulb and it burns out again in a week?

A bulb that burns out when ready usually means the socket is corroded or the housing is cracked and letting water in. Moisture inside the housing causes corrosion, which creates a bad electrical connection. You will need to replace the housing assembly, not just the bulb.

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

No. License plate lights draw very little power, and you are not working on the main electrical system. You can change the bulb with the battery connected and the car off. Just make sure the headlights are off before you start.

What if the housing will not come out no matter how hard I pull?

Stop pulling — you may break the clips. Check your owner's manual to see if the housing is accessed from inside the trunk. Some vehicles require you to remove trim panels or reach the housing from behind. If the manual does not help, a photo at an auto parts store can show you the right approach.

Can I use a different bulb type if I cannot find the exact one?

No. Bulb types are designed for specific sockets and brightness levels. Using the wrong bulb can cause it to not fit, not light up, or burn out the socket. Buy the correct type — it is inexpensive and takes one phone call to confirm.