1Locate the taillight
Open the trunk or tailgate and find the back of the taillight.
FREE REPAIR GUIDE
How to Replace a Brake Light Bulb
Replace a brake or tail light bulb in 10–20 minutes. Find the bulb, swap it, and test it safely.
DIFFICULTYEasy
ESTIMATED TIME10–20 min
TOOLSScrewdriver (sometimes)
POTENTIAL SAVINGS$30–60Labour estimate · varies
Know what you’re replacing.
A dead brake light is a safety risk and an easy ticket. On most cars the bulb is reached from inside the trunk or by unbolting the taillight. It takes 10–20 minutes. If all brake lights are out at once, it's more likely a fuse or the brake light switch.
What you’ll need.
Brake / tail light bulbCheck your bulb code (e.g. 7443, 3157, 1157) · ~$8–15
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Trim removal toolPops panels without breaking clips · ~$8
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A little preparation first.
- Find the bulb code in the owner's manual.
- Have a helper to press the brake pedal for the test.
One step at a time.
2Remove the access panel or screws
Pop off the small trim panel or remove the screws holding the light.
3Pull the light out (if needed)
On many SUVs and trucks the whole taillight pulls straight back after removing the screws.
4Swap the bulb
Twist the socket out, pull the old bulb straight out, push the new one in.
5Reinstall and test
Refit the socket and light, then have a helper press the brake while you check.
Log in 
Troubleshooting
All brake lights outCheck the fuse, then the brake light switch at the pedal.Bulb glows dimWrong bulb type (single vs dual filament) or a bad ground.
FAQ
LED bulbs?They work in many cars, but some cause a 'bulb out' warning or fast blinking.Third brake light?Usually a separate unit; some are sealed LED assemblies.
General guidance only. Procedures vary by year, engine and trim; if unsure, consult a qualified mechanic or your owner’s manual.