You can replace most headlamps yourself in 15 to 30 minutes with basic tools

A burned-out headlamp is one of the easiest car repairs to do at home. The bulb sits in a socket at the back of the headlamp housing, and you reach it from inside the engine bay without removing anything else. The whole job takes longer to read about than to do.

The exact steps depend on your car's year, make, and model—some designs let you twist the bulb out by hand, others require you to unclip a wire connector first. Your owner's manual shows the exact method for your vehicle, and most auto parts stores will also tell you the procedure when you buy the replacement bulb.

Key Takeaways

  • Turn off the engine and let it cool for at least five minutes before touching any part of the headlamp assembly, because the housing gets hot during use.
  • Buy the correct bulb type for your car before you start—the manual lists it, or an auto parts employee can look it up by your vehicle's year, make, and model.
  • Handle the new bulb only by its plastic base, never the glass, because skin oils cause premature failure.
  • Test both headlamps on low beam before closing the hood to confirm the new bulb works and you did not accidentally disconnect the working lamp.

Gather the right bulb and tools before you start

Open your owner's manual and find the headlamp section—it will tell you the bulb type (such as H7, 9005, or H11). Write down the type and take it to an auto parts store, or order online. The bulb costs between $5 and $25 depending on the type; halogen bulbs are cheapest, LED and HID bulbs cost more.

You will need a screwdriver (usually Phillips head) and possibly a socket wrench, though many cars need neither. Some vehicles require you to remove a plastic trim piece or wheel well liner to reach the back of the headlamp. Check your manual first so you are not surprised.

Do not buy the bulb until you know the type—buying the wrong one wastes money and time. If your manual is missing, search online for "[your year] [make] [model] headlamp bulb type" and you will find the answer in seconds.

Turn off the engine and wait for the headlamp to cool

Park the car and turn off the engine. Let it sit for at least five minutes. The headlamp housing gets very hot during use, and touching it while warm can burn your hand or damage the new bulb before it even goes in.

Open the hood and locate the headlamp that is burned out. Look at the back of the housing—you will see either a plastic bulb holder that twists out, or a wire connector plugged into the back. Your manual will show which one your car has.

Remove the old bulb by twisting or unplugging

If your car has a twist-out bulb holder, grasp it firmly and turn it counterclockwise—usually about a quarter turn—until it comes free. The bulb and holder come out as one piece. Once out, you can push the bulb straight back into the holder to release it, then pull it out.

If your car has a wire connector, pinch or press the clip on the connector and pull it straight out. Do not yank on the wire itself. Once the connector is free, the bulb holder will either twist out or pull straight back—your manual shows which. Some cars have a small wire bail or clip holding the holder in place; if you see one, unhook it first.

Set the old bulb aside. Do not touch the glass of the new bulb with your bare fingers—skin oils cause the bulb to fail early. If you do touch it, wipe it clean with a lint-free cloth before installing it.

Insert the new bulb and reconnect the holder

Hold the new bulb by its plastic base only. Push it straight into the holder until you hear or feel a click. The bulb should sit flush and not wobble.

Twist the bulb holder back into the headlamp housing clockwise until it stops—do not force it. If your car uses a wire connector, push the connector straight onto the back of the holder until it clicks into place. If there was a wire bail or clip, hook it back over the holder.

Do not touch the glass of the bulb after it is installed. If you accidentally brushed it, remove the bulb, wipe the glass with a clean cloth, and reinstall it.

Test the headlamp before closing the hood

Close the hood partway but do not latch it. Sit in the driver's seat, turn on the headlamps to low beam, and check that the new bulb is lit. Walk around the front of the car and confirm the light is bright and even. If the bulb does not light, turn off the headlamps, open the hood, and check that the connector is fully seated or the bulb holder is fully twisted in.

Also turn on the high beam and check that the other headlamp (the one you did not replace) still works. If it does not, you may have accidentally disconnected it—check the connector on that side and reseat it.

Once both lamps are working, close and latch the hood. The job is done.

Common mistakes that cause the bulb to fail early or not work

Touching the glass with bare fingers. Skin oils cause the bulb to overheat and burn out within weeks. If you touch it, wipe it with a lint-free cloth before installing.

Forcing the bulb holder to twist. If it does not turn smoothly, stop and check your manual—you may be turning the wrong direction, or there may be a clip you need to unhook first. Forcing it can crack the holder.

Not waiting for the headlamp to cool. A hot housing can melt the plastic base of the new bulb or warp the holder. Always wait at least five minutes after turning off the engine.

Buying the wrong bulb type. Double-check the manual or ask the auto parts employee to confirm the type before you leave the store. Installing the wrong bulb wastes time and money.

Not testing before closing the hood. If the bulb does not work, you will have to open the hood again in the dark to troubleshoot. Test it while the hood is still open.

Frequently Asked Questions

Can I replace a headlamp bulb if the headlamp housing is cracked?

Yes, you can replace the bulb. A cracked housing will let water in over time, which can damage the wiring, but the bulb itself will still work. Plan to replace the entire headlamp assembly eventually, but the bulb replacement will buy you time.

What if the bulb holder is stuck and will not twist out?

Stop twisting and check your manual—you may be turning the wrong direction. If it is stuck after confirming the direction, spray a small amount of penetrating oil (like WD-40) around the base of the holder, wait 10 minutes, and try again. Do not force it or you will crack the plastic.

Do I need to replace both headlamp bulbs at the same time?

No. Replace only the burned-out bulb. However, if both bulbs are old and one just burned out, the other will likely fail soon, so some people replace both to avoid a second trip under the hood.

Is it safe to drive with one headlamp out?

It is legal in most places to drive during the day with one headlamp out, but it is unsafe at night and illegal in many states. Replace the bulb as soon as you can.

Why did my new headlamp bulb burn out after a few weeks?

The most common cause is touching the glass with bare fingers during installation. Skin oils cause the bulb to overheat. Other causes include a faulty connector that is not making good contact, or a wiring problem in the car itself. If the bulb burned out again, wipe the new bulb with a lint-free cloth before installing it, and check that the connector clicks firmly into place.