The basic steps to change your license plate light

A burned-out license plate light takes about five minutes to fix and costs between $5 and $15 for a replacement bulb. You'll need a screwdriver (usually Phillips head, sometimes flathead), the correct replacement bulb for your vehicle, and a clean, well-lit workspace. Most cars have two lights mounted on the back bumper or tailgate, one on each side of the plate.

The process is the same whether you're replacing one bulb or both: locate the light housing, remove the lens or cover, take out the old bulb, insert the new one, and reinstall the lens. The whole job requires no special tools beyond a screwdriver, and you don't need to disconnect the battery or remove the license plate itself.

Key Takeaways

  • Most license plate lights use a standard bulb that costs $5 to $15 and takes five minutes to replace without tools beyond a screwdriver.
  • The light housing is held in place by one or two screws on the back of the bumper or tailgate, visible from underneath the plate.
  • Check your owner's manual or the bulb packaging to confirm the correct bulb type for your vehicle, since different models use different sizes.
  • Handle the new bulb by its plastic base, not the glass, to avoid oils from your skin that can shorten its lifespan.
  • If the light still doesn't work after replacing the bulb, the socket or wiring may be damaged and require professional repair.

Locate the light housing and remove the screws

Stand behind your vehicle and look at the license plate. You'll see a rectangular or oval light fixture mounted on the bumper or tailgate, usually one on each side of the plate. The housing is held in place by one or two small screws visible from the back. Use your screwdriver to remove these screws completely—set them somewhere you won't lose them, like a small cup or the palm of your hand.

If the screws are stuck or corroded, spray a small amount of penetrating oil (like WD-40) around the screw head and wait a few minutes before trying again. Don't force a stuck screw, as stripping it will make the job harder. Once the screws are out, gently pull the entire light housing away from the bumper.

Remove the lens and take out the old bulb

The light housing has two parts: an outer lens (the clear or translucent cover) and an inner socket that holds the bulb. Some lenses are held in by screws; others snap in and out. If you see screws around the edge of the lens, remove them. If there are no screws, try gently twisting the lens counterclockwise or pressing on it to see if it pops out.

Once the lens is off, you'll see the bulb socket. The bulb itself is usually held in by a straightforward twist-and-pull motion: push it in slightly and turn it counterclockwise until it stops, then pull it straight out. Some bulbs are held in by a wire clip instead—if that's the case, gently unhook the clip and slide the bulb out. Don't force it; if it's stuck, wiggle it gently side to side as you pull.

Install the new bulb and reassemble

Before you touch the new bulb, check the packaging or your owner's manual to confirm it's the correct type for your vehicle. Common sizes are 194, 168, 2825, and 921, and using the wrong size can cause the bulb to sit too loose or too tight in the socket. Hold the bulb by its plastic base only—oils from your skin can damage the glass and cause premature failure.

Insert the new bulb into the socket and turn it clockwise until it stops and sits flush. You should feel a slight resistance, but don't force it. If you're using a bulb held by a wire clip, slide it in and find the clip. Now reinstall the lens by reversing how you removed it: screw it back on if it had screws, or snap it back in if it was a press-fit. Finally, slide the entire light housing back onto the bumper and reinstall the two screws. Tighten them firmly but not so hard that you strip them.

Test the light before you finish

Turn on your headlights or have someone press the brake pedal while you stand behind the car to see if the new bulb lights up. If it does, you're done. If it doesn't, turn off the lights and remove the housing again to check that the bulb is seated properly in the socket. Sometimes a bulb that looks installed correctly is actually sitting slightly crooked and not making full contact.

If the bulb is seated correctly and still doesn't light, the problem is likely a bad socket, corroded wiring, or a blown fuse. This requires professional diagnosis and repair, as it involves electrical work beyond bulb replacement.

Common mistakes that prevent the light from working

The most frequent error is installing the bulb upside down or at an angle. The bulb should sit straight into the socket with no gaps, and you should hear or feel a small click when it's fully seated. Another common mistake is touching the glass part of the bulb with bare hands—the oils left behind can cause hot spots that shorten the bulb's life or cause it to fail when ready.

A third mistake is buying the wrong bulb size. If you're unsure which bulb your car uses, check the owner's manual, ask at an auto parts store, or look at the socket itself—many sockets have the bulb size printed on them. Installing a bulb that's too large can crack the socket, and one that's too small will fall out or make poor contact.

Where to buy replacement bulbs

License plate light bulbs are sold at any auto parts store (AutoZone, O'Reilly, Advance Auto Parts, NAPA), most big-box retailers (Walmart, Target), and online (Amazon, eBay). Prices range from $5 to $15 per bulb depending on the brand and type. Some bulbs are halogen, some are LED, and some are incandescent—LED bulbs last longer but cost more upfront. For a license plate light, a standard halogen bulb is usually the cheapest and most reliable choice.

If you're unsure which bulb to buy, bring your vehicle's year, make, and model to the store, or look it up on the retailer's website. Most auto parts stores will also install the bulb for free if you buy it from them, so that's another option if you'd rather not do it yourself.

Frequently Asked Questions

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

No. The license plate light circuit is low-voltage and low-power, and disconnecting the battery is unnecessary and will reset your car's clock and radio settings. straightforward turn off the lights and proceed with the replacement.

What if the light housing is stuck and won't come off the bumper?

Spray penetrating oil around the edges where the housing meets the bumper and wait five minutes. Gently rock the housing side to side as you pull, rather than pulling straight back. If it's still stuck, the housing may be glued or sealed with old caulk—carefully work a plastic pry tool around the edge to break the seal.

Can I use an LED bulb instead of halogen?

Yes, as long as the LED bulb is the correct size for your socket. LED bulbs last much longer (up to 50,000 hours versus 1,000 for halogen) but cost $10 to $20 per bulb. They also run cooler, which can extend the life of the plastic lens. Check that the LED bulb is rated for your vehicle's voltage, usually 12 volts for cars.

Why does my new bulb keep burning out?

The most common cause is touching the glass with bare hands during installation—oils cause hot spots that shorten bulb life. Other causes include a loose socket connection, incorrect bulb size, or an electrical problem in the circuit. If the bulb burns out again within a few weeks, have a mechanic check the socket and wiring.

Is it illegal to drive with a burned-out license plate light?

Yes, in most states. A working license plate light is required by law so that the plate is visible at night. Driving with a burned-out light can result in a traffic citation. Replace it as soon as you notice it's out.