How to Replace a Headlight Bulb
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A burned-out headlight is a ticket and a safety problem, and on most cars the fix is a $15 bulb and twenty minutes. The hard part is access: some bulbs twist out from behind the housing, others sit behind the battery or an airbox. One rule matters above the rest — never touch the glass of a halogen bulb with bare fingers.
Work with the lights switched off and the bulb cool — halogens run hot enough to burn skin. Many modern cars use sealed LED units that are not owner-serviceable; if there is no bulb to twist out, stop there. Never force a connector or clip — a broken housing tab turns a $15 job into a several-hundred-dollar one.
What you'll need
- Correct replacement bulb (the manual's bulb chart or the code on the old bulb's base — H11, 9005, H7; do not mix up types)
- Nitrile gloves or a clean cloth (skin oil burns halogen glass)
- Screwdriver or trim tools (only if your car needs covers or brackets loosened for access)
- Rubbing alcohol (in case you touch the glass)
The steps
Tap through one step at a time — built for one-handed use at the roadside — or switch to all 5 steps to read ahead or print.
Step 1 of 5: Find the back of the headlight
Step 1: Find the back of the headlight
Open the hood and look behind the headlight assembly for the bulb socket — a round plastic fitting with wires running to it. Some cars have a rubber dust cover you rotate off first; on others the battery, an airbox, or a washer bottle blocks your hand, and loosening one bracket opens the space — the owner's manual shows the path. Note that many modern cars use sealed LED units with no replaceable bulb at all; if there is no socket, this is a shop job.
Step 2: Unplug the connector
Find the locking clip on the electrical connector, press or lift it, and pull the connector straight off the bulb. Never yank the wires — pull on the plastic body. If the connector is baked on with age, wiggle it side to side as you pull rather than prying at it.
Step 3: Twist the bulb out
Grip the bulb's plastic base, twist counterclockwise about a quarter turn until it stops, and draw the bulb straight out. Some cars hold the bulb with a wire spring clip instead — press and unhook the clip, and do not bend it, because a bent clip will not hold the new bulb snug.
Step 4: Fit the new bulb by its base
With gloves on or a cloth between your fingers and the bulb, align the tabs on the new bulb's base with the slots in the housing, push it home, and twist clockwise to lock — or refit the wire clip. Handle the bulb by the plastic base only: skin oil on halogen glass creates a hot spot that burns the bulb out early.
If you do touch the glass, clean it with rubbing alcohol on a cloth and let it dry completely before installing.
Step 5: Test the beam against a wall
Reconnect the plug, refit the dust cover, and switch the lights on facing a wall or garage door from a few feet back. Both beams should light at the same height and brightness. If the new beam sits high, low, or scattered, the bulb is not fully seated — take it out and refit it before driving.