Car Guides

John Paul, AAA Northeast’s Car Doctor, answers a question from a reader whose vehicle’s low-beam headlight bulbs have been burning out frequently.

Why do my headlights keep burning out?
Wieck/ American Honda Motor Co., Inc.

Any ideas as to what’s causing my vehicle’s headlights to keep burning out?

Q. I have a 2015 vehicle, and it has gone through four low-beam headlight bulbs in the past year. I drive about 20,000 miles a year, and I keep the headlights on all the time, as you’ve recommended. Any possible reasons why this is happening?

A. I’m assuming that your shop is using quality bulbs and that a mechanic has checked the wiring and sockets. The most common issue that shortens bulb life is higher-than-normal voltage. At this point, I would check the voltage to the headlight bulbs. If the voltage seems normal, see if you can have a technician wire a volt meter into the headlight system. You may see that occasionally the voltage spikes, and that’s what is damaging the bulbs.

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John Paul is AAA Northeast’s Car Doctor. He has over 40 years of experience in the automotive business and is an ASE certified master technician. Email your car question to [email protected] .

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