You can replace most brake lights yourself in under 15 minutes with no tools beyond a screwdriver
A brake light replacement is one of the simplest car maintenance tasks you can do. The process differs slightly depending on your vehicle's year and model, but the basic steps are the same: access the light housing from inside your trunk or behind the bumper, twist out the old bulb, and install a new one. Most people spend more time finding the right bulb at the store than doing the actual work.
The hardest part is usually knowing which bulb to buy. Your owner's manual lists the exact bulb type, or you can take a photo of your current bulb to an auto parts store and they will match it. Common brake light bulbs are 1157, 1156, or 7443, but your car may use something different. Buying the wrong bulb means a wasted trip back to the store.
Key Takeaways
- Most brake lights are accessed from inside the trunk by removing a plastic panel or twisting out a housing from behind the bumper.
- Your owner's manual or an auto parts store can tell you the exact bulb type your car needs before you start.
- The bulb twists counterclockwise out of its socket; do not pull straight out or you may break the housing.
- New bulbs cost between $5 and $15, and the entire job takes 10 to 15 minutes without special tools.
Locate the brake light housing from inside your trunk
Open your trunk and look at the inner wall where the brake lights are mounted on the outside of your car. You will see either a plastic panel covering the light assembly or the back of the light housing itself protruding into the trunk. If there is a panel, look for clips or screws holding it in place. Most panels pop out by hand or with gentle prying; a few are held by one or two Phillips-head screws.
Once the panel is off or the housing is visible, you will see the back of the light assembly. There are usually two or three round sockets sticking out — one for the brake light, one for the tail light, and sometimes one for the turn signal. The brake light is typically the larger or brighter bulb. If you are unsure which socket is which, your owner's manual will show you a diagram, or you can take a photo and ask at an auto parts store.
Remove the old bulb by twisting counterclockwise
Grip the bulb holder (the plastic or metal piece the bulb sits in) and twist it counterclockwise. The entire holder will rotate out of the socket — do not try to pull the bulb straight out of the holder. Twisting takes gentle, steady pressure; forcing it can crack the plastic. Once the holder is free, you can pull the bulb out of the holder by hand or by twisting it further, depending on the bulb type.
Set the old bulb and holder aside. Look at the socket where the bulb was sitting. It should be clean and dry. If you see corrosion (a white or green crusty buildup), wipe it out gently with a dry cloth or a pencil eraser. Corrosion can prevent a new bulb from making good contact and cause it to flicker or not light at all.
Install the new bulb into the holder
Take your new bulb and insert it into the holder. Most bulbs push straight in and twist to lock, while others straightforward push in without twisting. Check your bulb package or owner's manual if you are unsure. The bulb should sit flush in the holder with no gaps. Do not force it — if it does not slide in smoothly, you may have the wrong bulb type.
Once the bulb is seated in the holder, the whole assembly is ready to go back into the socket. Some people test the bulb before reinstalling it by turning on the car's lights, but this is optional. If you want to test, have someone press the brake pedal while you watch the light from outside the car, or turn on the headlights and brake lights from the dashboard while looking in a mirror.
Twist the holder back into the socket clockwise
Align the holder with the socket and twist it clockwise until it stops. You will feel it seat into place — it should be snug but not so tight that you need to strain. The holder will click or catch when it is fully installed. Do not over-tighten; you can crack the plastic housing or strip the socket.
Once the holder is in, the light is installed. Turn on your brake lights one more time to confirm the new bulb works. Have someone press the brake pedal or use your phone's camera to check if the light is bright and even. If the light does not come on, the bulb may not be seated properly — twist the holder out again and reseat the bulb in the holder.
Reinstall the trunk panel or cover
If you removed a plastic panel to access the light, slide it back into place and find any clips or screws. Make sure the panel sits flush and does not rattle when you close the trunk. If you were working with an exposed housing (no panel), there is nothing to reinstall — just close the trunk.
Close the trunk and test the brake lights one final time by pressing the brake pedal or having someone else do it while you watch from outside. Both brake lights should be equally bright. If one is noticeably dimmer than the other, the new bulb may be a different type than the original, or it may not be fully seated. If both lights work and match, the job is complete.
What to do if the bulb does not light up
If you installed a new bulb and it still does not light, the problem is usually one of three things: the bulb is not fully seated in the holder, you have the wrong bulb type, or there is a wiring or fuse issue. Start by removing the holder again and checking that the bulb is pushed all the way in. Reseat it firmly and test again.
If the bulb is seated correctly but still does not light, remove it and compare it to the old bulb or to your owner's manual. If you bought the wrong type, take it back to the store and exchange it for the correct one. If the bulb type is correct and it still does not work, the issue is likely a blown fuse or a wiring problem — this is beyond a straightforward bulb replacement and you should have a mechanic inspect it.
Frequently Asked Questions
Do I need any special tools to replace a brake light?
No. Most brake lights are accessed by hand or with a Phillips-head screwdriver to remove a panel. Some cars require a small flathead screwdriver to pry off a trim piece, but nothing more. If your car needs special tools, your owner's manual will mention it.
Can I touch the new bulb with my bare hands?
It depends on the bulb type. Halogen bulbs should not be touched with bare skin because the oils from your hands can damage the bulb and shorten its life. Standard incandescent bulbs are fine to touch. If you are unsure, wear a clean cloth or glove when handling the bulb, or wash your hands first.
What if my car has LED brake lights instead of bulbs?
LED lights are sealed units that cannot be serviced by hand. If an LED brake light fails, the entire light assembly usually needs to be replaced, which requires removing bolts from inside the trunk or behind the bumper. This is more involved than a bulb replacement and may require a mechanic.
How much does a replacement brake light bulb cost?
Standard brake light bulbs cost between $5 and $15 at an auto parts store. Premium or specialty bulbs may cost more. Buying two bulbs at once is common because if one has failed, the other is likely to fail soon.
How often do brake lights need to be replaced?
Brake light bulbs typically last several years, but there is no set timeline. They fail when they fail. If one brake light burns out, it is a good idea to replace both at the same time so they age together and you do not have mismatched brightness.