Most tail lights come out from inside the trunk, not from behind the car

You can change a tail light yourself without tools or a mechanic visit. The process takes about 10 minutes and costs $15 to $30 for the bulb. The exact steps depend on your vehicle's design — some lights pull straight out from the trunk side, others require removing a panel or unscrewing a housing from outside — but the principle is the same: locate the burned-out bulb, remove it, and insert a new one of the same type.

Start by opening your trunk and looking at the inside wall where the tail light housing sits. You will see either a plastic panel you can peel back, a set of bolts holding the housing in place, or a bulb socket that twists out. Your owner's manual shows which design your car uses, but you can also search your vehicle's year, make, and model plus "tail light replacement" online to find a photo guide specific to your car.

Key Takeaways

  • Most tail lights are accessed from inside the trunk by removing a panel, unscrewing bolts, or twisting out a bulb socket.
  • You need to know your bulb type — usually listed in the owner's manual or on the old bulb itself — before you buy a replacement.
  • Bulbs cost $15 to $30 and come in standard types like 1157, 7440, or 3157 that fit many vehicles.
  • If the housing is cracked or the bulb does not light after replacement, the problem is not the bulb and you need a mechanic.

Identify your bulb type before you shop

The bulb type matters because tail lights use different sockets and wattages depending on the vehicle. Open your owner's manual and search for "bulb specifications" or "light bulb replacement." You will find a chart listing the bulb type for each light — tail light, brake light, turn signal, and reverse light often use different bulbs.

Common tail light bulb types include 1157 (dual-filament, used for brake and tail lights combined), 7440 (single-filament tail light), and 3157 (another dual-filament option). The number is printed on the old bulb itself, so if you cannot find your manual, you can remove the old bulb and read it. Write down the number before you go to the parts store, or take a photo of the bulb to show the clerk.

Remove the tail light housing or bulb socket

Once you know your bulb type, open the trunk and locate the tail light housing on the inside wall. Look for one of three access methods:

  • Peel-back panel: Some cars have a plastic trim panel covering the bulb socket. Gently peel it back from the edge — it is held by clips, not glued — and you will see the socket behind it.
  • Bolts from inside: Other vehicles have two or three bolts visible on the inside of the trunk. Use a Phillips or flathead screwdriver (whichever fits) to remove them. The entire housing will come loose and you can pull it toward the inside of the trunk.
  • Twist-out socket: Some cars let you reach in and twist the bulb socket counterclockwise. It will come free in your hand, and the bulb is inside the socket.

If you cannot find any of these, consult your owner's manual or search your vehicle online. A few older or specialty vehicles require removing the bumper or accessing the light from outside, but this is rare on modern cars.

Remove the old bulb and install the new one

Once the housing or socket is accessible, locate the bulb. If the socket came out in your hand, the bulb is inside it. If the housing is still attached to the car, you will see the bulb socket sticking out from the back of the housing.

Grasp the bulb and pull it straight out of the socket. It should come free with gentle pressure — do not twist it unless it is a bayonet-style bulb (which has small pins on the sides), in which case twist counterclockwise. Set the old bulb aside.

Take your new bulb and insert it into the socket, pushing straight in until it seats fully. If it is a bayonet bulb, push in and twist clockwise until it clicks. Do not force it — if it does not go in smoothly, you may have the wrong bulb type. Check the number on the new bulb against your manual.

Test the light before you close everything up

Before you reassemble the housing or panel, test the light. Have someone stand behind the car and watch the tail light while you turn on the headlights (for tail light function) or press the brake pedal (for brake light function). If the light comes on, you are done. If it does not, remove the bulb and check that it is seated all the way in the socket.

If the bulb is seated correctly and the light still does not work, the problem is not the bulb. The socket may be corroded, the wiring may be damaged, or the housing itself may be faulty. In this case, you need a mechanic to diagnose the issue.

Reassemble the housing or panel

Once the light works, reverse the steps you took to access it. If you removed bolts, screw them back in firmly but do not overtighten — you only need them snug enough that the housing does not rattle. If you peeled back a panel, press it back into place until the clips catch. If you twisted out a socket, twist it back into the housing clockwise until it stops.

Close the trunk and you are finished. The entire job should take 10 to 15 minutes. Keep the old bulb in case you need to reference the type later, or dispose of it according to your local rules for used bulbs.

What to do if the housing is damaged or the bulb keeps burning out

If the tail light housing is cracked, cloudy, or leaking water, the bulb will burn out repeatedly because moisture corrodes the socket. A cracked housing also fails to direct light properly and reduces visibility. You cannot repair this with a new bulb — you need a replacement housing, which typically costs $100 to $300 depending on the vehicle and whether you use an original part or an aftermarket one.

If a new bulb burns out within a few weeks, the socket may be corroded or the wiring may be sending too much power to the bulb. This also requires a mechanic's diagnosis. Do not keep replacing bulbs hoping the problem goes away — a faulty circuit can damage the new bulb each time and may eventually affect other lights on that circuit.

Frequently Asked Questions

Do I need to disconnect the battery before changing a tail light?

No. Tail lights operate on low voltage and you are not working with the engine or electrical system. straightforward turning off the headlights and brake lights is enough. Disconnecting the battery is unnecessary and will reset your car's computer settings.

What if I cannot find the bulb socket from inside the trunk?

Some vehicles require access from outside the car. Check your owner's manual for the specific steps. You may need to remove the bumper cover or access the light through a wheel well. If the manual is unclear, search your vehicle's year, make, and model plus "tail light replacement" online to find a photo guide.

Can I use a different bulb type if the correct one is not in stock?

No. Bulb types are matched to the socket and wattage requirements of your vehicle. Using the wrong type can cause the light to be too dim, overheat the socket, or not fit at all. Wait for the correct bulb or order it online rather than substituting.

Why is my new tail light bulb already burned out after a few days?

The socket may be corroded, the wiring may be faulty, or you may have installed the wrong bulb type. Remove the bulb and inspect the socket for corrosion or water. If the socket looks clean and you used the correct bulb, have a mechanic check the wiring and circuit.