What a license plate light does and why it's legally required
A license plate light is a small bulb mounted above or below your rear license plate that illuminates the plate at night. Its only job is to make your plate readable to other drivers and law enforcement when your headlights are on or when it's dark. Most states require this light to work, and a burned-out bulb is a reason a police officer can pull you over.
The light is wired to turn on automatically when you set up your headlights or parking lights. It draws very little power — typically 5 to 10 watts — and sits in a fixture that's usually plastic or metal with a lens. On most vehicles, the fixture is mounted directly on the bumper or body panel, making it one of the easiest lights on your car to replace yourself.
Key Takeaways
- A burned-out license plate light is a traffic violation in all 50 states and can result in a ticket or a reason to be stopped.
- Replacement bulbs cost between $3 and $15, and the job takes 5 to 15 minutes if you do it yourself.
- Most vehicles use either a standard incandescent bulb (like a 194 or 168) or an LED unit that clips into the fixture.
- You can check if your light is working by parking in front of a wall at night with your headlights on, or by asking someone to look at the plate while you sit in the driver's seat.
How to tell if your license plate light is burned out
The simplest test is to park in front of a wall or garage door at night, turn on your headlights, and look in your side mirror or get out and look directly at the plate. If the area around the plate is dark, the light is not working. You can also ask a friend or family member to stand behind your car while you turn on the headlights and tell you whether they can see the plate clearly.
Some vehicles have two license plate lights — one on each side of the plate — and only one may have burned out. Check both. If you notice the light is dim but not completely dark, it may still be working but nearing the end of its life. A light that flickers or only works intermittently usually means the bulb is failing or the connection is loose.
Bulb types and what your vehicle uses
The bulb type depends on your vehicle's year, make, and model. The most common types are the 194 (also called 168, 2825, or W5W), which is a small incandescent bulb about the size of a pea. These cost $3 to $8 and last roughly 1,000 to 2,000 hours. Newer vehicles often use LED license plate light units that clip into the fixture as a complete assembly rather than a single bulb. LED units cost $8 to $15 but last much longer — typically 10,000 to 50,000 hours.
The easiest way to find out which type your vehicle needs is to check your owner's manual under "Bulb Specifications" or "Lighting." You can also remove the fixture and look at the bulb itself or the socket to see what's printed on it. If you're unsure, bring the old bulb or a photo of the fixture to an auto parts store, and staff can match it for you. Most stores will not charge for this service.
How to replace a license plate light yourself
Start by turning off your engine and headlights. Locate the fixture — it's usually held in place by one or two screws or clips on the bumper or body panel. Use a screwdriver (usually Phillips head) or your fingers to remove the fixture. Some fixtures twist counterclockwise to release from the housing.
Once the fixture is out, look at how the bulb is held in place. If it's a standard incandescent bulb, it will either push straight in or twist clockwise to lock. Push or twist the old bulb out gently — do not force it. Insert the new bulb the same way, making sure it's seated fully. If you're installing an LED unit, it usually clips in or snaps into place. Reinstall the fixture, tighten the screws, and test the light by turning on your headlights.
If the light still does not work after you've installed a new bulb, the problem may be a blown fuse, a loose wire connection, or a faulty socket. Check your owner's manual for the fuse location and fuse number for the license plate light circuit. If the fuse is blown, replace it with one of the same amperage. If the fuse is fine, the socket or wiring may need professional attention.
Cost comparison: DIY versus a mechanic or dealership
| Option | Bulb Cost | Labor Cost | Total | Time |
|---|---|---|---|---|
| Do it yourself | $3–$15 | $0 | $3–$15 | 5–15 minutes |
| Independent mechanic | $5–$15 | $20–$50 | $25–$65 | 1–2 days |
| Dealership | $8–$20 | $50–$100 | $58–$120 | 1–3 days |
For most drivers, replacing a license plate light yourself is worth the small effort. The bulb is inexpensive, the job requires no special tools, and you avoid labor charges. If you're uncomfortable working on your vehicle or the fixture is stuck, an independent mechanic will charge less than a dealership and can usually fit you in the same day.
A dealership will charge more for the same work because of higher overhead and labor rates. Unless your vehicle is under warranty and you want the work documented by the manufacturer, an independent shop is the better financial choice for this repair.
Why your license plate light matters beyond the law
A working license plate light is not just a legal requirement — it's a safety feature. If you're in an accident at night, a readable license plate helps other drivers and witnesses identify your vehicle. If you hit a parked car or are involved in a hit-and-run, a clear plate makes it easier for the other party to report the incident accurately. A burned-out light also makes your vehicle stand out to police, who may stop you for the violation and discover other issues during the stop.
Replacing the bulb takes less time than the traffic stop itself, so keeping it working is a straightforward way to avoid unnecessary police contact and keep your driving record clean. It's also one of the cheapest preventive maintenance tasks you can do on your vehicle.
Frequently Asked Questions
Can I get a ticket for a burned-out license plate light?
Yes. All 50 states require a working license plate light, and a burned-out bulb is a moving violation. The fine varies by state but typically ranges from $50 to $200. More importantly, it gives a police officer a legal reason to pull you over, which can lead to other citations or issues.
Will an LED license plate light last longer than a regular bulb?
Yes. LED units typically last 10,000 to 50,000 hours, compared to 1,000 to 2,000 hours for incandescent bulbs. If you drive 12,000 miles per year with headlights on for about 500 hours annually, an incandescent bulb may need replacement every two to four years, while an LED unit could last 20 years or more.
What if I replace the bulb and the light still does not work?
Check the fuse first — your owner's manual lists the fuse number and location. If the fuse is blown, replace it with one of the same amperage. If the fuse is fine, the socket, wiring, or headlight switch may be faulty. At that point, a mechanic can diagnose the electrical issue.
Do I need to remove the entire bumper to replace the license plate light?
No. The fixture is usually held by one or two screws or clips on the bumper surface and can be removed without taking off the bumper. On rare vehicles, the fixture may be mounted inside the bumper, but even then you can usually access it from underneath or from the side without full bumper removal.
Can I use any bulb that fits in the socket?
No. Use only the bulb type specified in your owner's manual or on the fixture itself. Using the wrong wattage or type can cause the bulb to burn out quickly, overheat the socket, or not fit properly. The correct bulb is inexpensive and readily available at any auto parts store.