How Do I Figure Out Car Bulb Size?

Figuring out the size of car bulbs can be a daunting task, especially for those who don’t have much experience with car maintenance. Luckily, there are several ways to figure out the bulb size you need for your particular make and model. The following article will explain how to identify a car bulb size by examining the existing bulbs in your car and by looking up the bulb size in your vehicle’s owner’s manual.

Does any headlight bulb fit any car?

Depending on the car’s make, model and year of manufacture, each vehicle will require a specific type, size and fitting bulb for its headlights. In other words, there are many factors you must take into account when looking for a replacement bulb.

Examining Existing Bulbs

If you’re not sure what size car bulbs to buy, the first step is to identify the existing bulbs in your car. Open the hood of your car, and be aware that some cars may require you to use a bulb remover tool. Once you have access to the bulbs, take note of any numbers or letters printed on them. These indicate the size and type of bulb.

If there is no manufacturer number or lettering on the existing bulbs, look closely at their shape and size so that you can purchase a replacement with the same dimensions. If you’re still not sure, bring the existing bulbs to an auto parts store so a salesperson can help you find the correct size.

Blown bulb for the car headlight. Car accessories on a workshop black table. Dark background.

Checking Your Vehicle Owner’s Manual

Another way to determine your car bulb size is to check your vehicle’s owner’s manual. This document should contain a section on “Light Bulb Replacement,” and it will list the sizes of all bulbs used in your vehicle. If you don’t have access to the manual, look up the make and model of your car online. You should find a downloadable version of the owner’s manual with this information included.

Light bulb chart

Finally, Tahoe car owners can use a Tahoe light bulb chart to determine which bulbs are used in their vehicle. The Tahoe chat includes common bulbs used in Tahoe headlights, tail lights and fog lamps and the equivalent sizes for different makes and models. With this tool, Tahoe drivers can quickly identify the bulb size they need to buy.

What are the 3 types of headlights?

The three main types of headlights are halogen, xenon (HID) and LED.

Halogen headlights

Halogen headlights are the most common type of headlight found in cars. They use halogen gas-filled bulbs that contain a filament. These lights tend to be brighter and have a longer life than traditional incandescent bulbs.

Xenon (HID) headlights

Xenon (High Intensity Discharge) headlights use a xenon gas-filled bulb that contains electrodes. When an electric current is applied, the xenon gas emits a bright light with excellent visibility.

LED headlights

LED (Light Emitting Diode) headlights are the most energy efficient type of headlight available on the market today. They produce a bright, white light that is both long-lasting and energy efficient.


While figuring out the size of car bulbs can be intimidating, it is a task that can be accomplished with the right knowledge. Make sure to examine existing bulbs and your vehicle owner’s manual for information on bulb size. For Tahoe owners, you can use a Tahoe light bulb chart to quickly identify the correct bulb size for your make and model. Knowing the right bulb size can save time and money when it comes to replacing your car’s bulbs.

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