What you need to do to replace a license plate light

Replacing a license plate light takes 15 to 30 minutes and requires only a screwdriver and a replacement bulb. You can do this yourself in most vehicles without special tools or a trip to a mechanic. The exact steps depend on whether your car has one or two lights above the plate and how the fixture attaches to your bumper or trunk.

Start by identifying which bulb has burned out — usually one light will be noticeably dimmer or dark. Then locate the fixture mounting screws (typically two), remove them, and pull the assembly away from the vehicle. The bulb itself twists or pulls straight out, depending on the type. Once you install the new bulb and reattach the fixture, test both lights before you drive.

Key Takeaways

  • Most license plate lights use a standard bulb size (commonly 194, 168, or 501), which you can buy at any auto parts store for $3 to $8.
  • The fixture is held by two screws on the bumper or trunk — removing them lets you access the bulb without disconnecting wiring.
  • Some bulbs twist counterclockwise to remove; others pull straight out — check your owner's manual or the fixture itself for the correct motion.
  • Test both lights with the headlights on before you finish, because a burned-out plate light can result in a traffic stop in most states.

Finding the right replacement bulb

The bulb size you need depends on your vehicle's year and model. Check your owner's manual first — it will list the exact bulb type in the lighting section. If you do not have the manual, look at the fixture itself; many have the bulb size printed on the housing.

Common license plate light bulbs are 194, 168, 501, or 555. Take a photo of the burned-out bulb or the fixture label and bring it to an auto parts store, where staff can match it for you. Buy two bulbs while you are there — the second one will last you years and costs only a few dollars more.

Removing the fixture from your vehicle

Park on a level surface and turn off the engine. Locate the two mounting screws that hold the light fixture to your bumper or trunk — they are usually visible from underneath or behind the plate. Use a Phillips or flathead screwdriver (whichever fits) to remove both screws completely.

Gently pull the fixture away from the vehicle. You may need to wiggle it slightly to clear the mounting holes. The fixture will not detach completely because wiring connects it to your vehicle's electrical system, but you will have enough slack to access the bulb. Do not pull hard or you risk damaging the wires.

Removing and replacing the bulb

Look at the back of the fixture where the bulb sits. If the bulb has a metal base with a small pin, push it in gently and twist counterclockwise until it stops, then pull it straight out. If the bulb has a plastic base, it usually pulls straight out without twisting.

Insert the new bulb using the same motion in reverse — push it in and twist clockwise if it has a pin, or straightforward push it in if it pulls straight. You should feel it seat firmly. Do not force it; if it does not slide in smoothly, you may have the wrong bulb size.

Reattaching the fixture and testing

Slide the fixture back into its mounting holes and align the screw holes. Insert both screws and tighten them firmly but not so hard that you crack the plastic housing. The fixture should sit flush against the bumper or trunk with no gaps.

Turn on your headlights and walk around to check both plate lights. Both should glow brightly and evenly. If one is still dim or dark, the bulb may not be seated correctly — remove the fixture again and reseat the bulb. Once both lights work, you are done.

When to replace both lights at the same time

If one bulb has burned out, the other is likely near the end of its life. Replacing both now means you will not have to repeat this job in a few weeks. The cost difference is minimal — usually $3 to $5 more — and you avoid a second trip under the bumper.

If you are replacing both, remove the fixture once and swap out both bulbs before reattaching. This is faster than doing them one at a time and ensures both lights are the same age and brightness.

What to do if the light still does not work

If you installed a new bulb and the light still does not turn on, the problem is likely a blown fuse or a wiring issue rather than the bulb itself. Check your owner's manual for the fuse box location and the correct fuse for the license plate lights. A blown fuse will look dark or have a broken wire visible inside the plastic casing.

If the fuse is intact or replacing it does not fix the problem, the wiring or socket may be damaged. This requires a mechanic or electrician, as it involves testing circuits and potentially replacing the entire fixture. Most auto shops can diagnose this in under an hour.

Frequently Asked Questions

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

No. A burned-out plate light is a traffic violation in all 50 states and can result in a ticket. Police use it as a reason to stop a vehicle, and some states impose fines of $50 to $200. Replace it before you drive.

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 do not need to disconnect anything — just turn off the engine and remove the fixture.

What if the fixture is stuck and will not come out?

Stop pulling. Stuck fixtures usually have corrosion or paint around the mounting holes. Spray the screws with penetrating oil (like WD-40), wait 10 minutes, and try again. If it still will not budge, a mechanic can remove it without damaging the bumper.

Is there a difference between LED and incandescent plate lights?

LED bulbs last much longer (50,000+ hours versus 1,000 hours) and use less power, but they cost more upfront. If your fixture accepts LED bulbs, they are worth the extra cost. Check your manual or ask at the auto parts store whether your vehicle's fixture is compatible.

Do both plate lights have to work, or just one?

Both must work. Most vehicles have two lights — one on each side of the plate — and both are required by law. A single working light is not enough to avoid a ticket.