License plate lights burn out and need replacing just like any other bulb

Your license plate light is a small bulb mounted above or below your rear license plate. It illuminates the plate so police and cameras can read it at night. Most states require it to work, and a burned-out bulb is a reason an officer can pull you over. The replacement itself takes 5 to 15 minutes and costs $5 to $25 for the bulb, depending on your vehicle.

The process is straightforward: you remove the light fixture cover, take out the old bulb, and install a new one. You do not need special tools for most vehicles, though some designs require a screwdriver or a socket wrench. The hardest part is usually finding the fixture in the dark or reaching it if your bumper sits low.

Key Takeaways

  • License plate light bulbs typically last 500 to 1,000 hours and cost between $5 and $25 to replace.
  • Most vehicles let you access the bulb from inside the trunk or from underneath the bumper without removing the entire fixture.
  • You need only the replacement bulb and possibly a screwdriver; no special tools or wiring knowledge is required.
  • A burned-out plate light is a traffic violation in all 50 states and gives an officer legal grounds to stop you.

Locate the light fixture and check what bulb type you need

Open your trunk and look at the inside of the rear panel, directly behind where your license plate sits. Most vehicles have a plastic or rubber cover that you can access from inside the trunk. Look for a small rectangular or circular fixture with wires attached. If you cannot see it from the trunk, the fixture may be accessible from underneath the bumper — you may need to crouch or lie on your back to see it clearly.

Once you find the fixture, check your owner's manual or look for a label on the fixture itself that tells you the bulb type. Common types are 194, 168, 2825, or 921. If there is no label, take a photo of the fixture and bring it to an auto parts store; staff can match it to the correct bulb. Write down the bulb type before you leave home so you buy the right one.

Remove the fixture cover or lens

Most license plate light fixtures have a cover that twists counterclockwise or clips out. Try twisting first — explore gentle, steady pressure and turn slowly. If it does not move, look for a small clip or tab on the side of the cover. Press or pry the tab gently with a flathead screwdriver and the cover should pop out.

Some vehicles, particularly older trucks and SUVs, have a fixture that is bolted to the bumper or frame. If yours is bolted, use a socket wrench or adjustable wrench to remove the bolts. Keep the bolts in a small container so you do not lose them. Once the cover is off or the fixture is loose, you will see the bulb socket inside.

Take out the old bulb and insert the new one

The bulb sits in a socket that may twist or push straight in. If it twists, turn it counterclockwise gently until it comes free. If it pushes straight in, pull it straight out toward you. Do not force it — if it feels stuck, wiggle it slightly while pulling or twisting.

Insert the new bulb by reversing the process. If the old bulb twisted out, twist the new one in clockwise until it is snug but not tight. If the old bulb pushed in, push the new one straight in until you feel it seat. The bulb should be flush with the socket, not sticking out. Turn on your headlights or parking lights to test the new bulb before you reassemble the fixture.

Reassemble the fixture and test the light

Twist the cover back on clockwise or snap the clips back into place. If you removed bolts, reinstall them and tighten them by hand first, then use your wrench to snug them down. Do not overtighten — you can crack the plastic fixture or strip the threads.

Close your trunk and turn on your parking lights or headlights. Walk around to the rear of the vehicle and confirm the 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. If the bulb is seated correctly and the light still does not work, the socket itself may be faulty and you may need a replacement fixture, which an auto parts store or mechanic can install.

When to replace the entire fixture instead of just the bulb

If the bulb is new and the light still does not turn on, the socket or wiring is likely damaged. Water can corrode the socket contacts, or a collision can break the wiring. In these cases, replacing just the bulb will not help.

A replacement fixture costs $15 to $60 and takes 15 to 30 minutes to install if you are comfortable with basic wiring. You unplug the old fixture's connector, remove the bolts, and bolt the new one in place, then plug in the connector. If you are not comfortable with wiring, a mechanic or auto parts store can install it for $50 to $150 in labor. This is still cheaper and faster than a dealership visit.

Frequently Asked Questions

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

Technically no — it is a violation in all 50 states. An officer can pull you over for it. However, many officers do not stop for a single burned-out light unless they have another reason to pull you over. That said, it is a quick and inexpensive fix, so replacing it removes the risk entirely.

What if I cannot find the fixture or remove the cover?

Some vehicles have fixtures that are harder to access than others. If you cannot locate it after checking the trunk and underneath the bumper, consult your owner's manual — it will have a diagram showing the exact location. If the cover will not budge, an auto parts store or mechanic can remove it without damage.

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

No. The license plate light circuit carries very low power and is safe to work on without disconnecting the battery. Just make sure the lights are off before you start, so you do not accidentally touch a hot wire or get startled by the light turning on.

How often do license plate light bulbs burn out?

Most bulbs last 500 to 1,000 hours of use. If you drive at night regularly, expect to replace the bulb every two to four years. LED bulbs last longer — often 10,000 to 50,000 hours — but cost more upfront, usually $15 to $25 instead of $5 to $10.