Your Cart is Empty

How To Find The Right Bulb Size For Your Vehicle

by Lasfit Official December 23, 2019

Automotive Bulb Size Guide

With more and more automakers fitting LED light bulbs in new vehicles as standard equipment, it’s easy to see that LEDs are the future of automotive lighting. And for good reason. So as a car owner, if you want to replace your factory halogen lamp to LEDs, you may need to know the interior and exterior bulb sizes. Different vehicle has different lights and therefore requires a different bulb size. There are driving lights, fog lights, brake lights, turn signal lights, reverse lights, marker lights and interior lights - just to name a few! Along with all of the different bulbs, there are also different fittings, depending on your vehicle year, make and model. 

The following guide will help you get the right bulb size through the different methods, and also some tips when you choose the LED bulbs.

#1 Check your vehicle's assembly, OEM or aftermarket

The aftermarket assembly might have different color (black background or smoke tinted lenses), or it could refer to advanced lighting elements like halo, projector, or colored LED light strips. If you find your assembly contains one or more of those features, it is the aftermarket housing. You need to reach out its manual or website to check the right bulb size.

Aftermarket headlight assembly

#2 Use LASFIT Bulb Finder

To find out which fitting you need for your factory vehicle and the bulb you are buying, you can use our online bulb finder on the home page.

But please attention, if your specific make and model was originally available with a choice of halogen, HID (xenon)  or LED lights, you'll see a drop down bar asking you to choose between the three. Because wiring connectors for halogen and HID lights differ and are not compatible, and factory LEDs are not able to be replaced by other aftermarket LED bulbs. You should stay with the same style that was originally equipped on your specific vehicle.

halogen and HID

#3 Referring to vehicle owner’s manual

You can also contact your vehicle manufacturer for the fitting information, or simply take a look in your vehicle owner’s manual, which should state all the fittings that your vehicle needs for each type of light. Or you could download the electronic manual from the Internet.

1. Find out your vehicle owner's manual or download it from the Internet. Google "year make model + owners manual". 

2. On the catalog, Find the "Bulb Replacement" item and relevant page number.

3. Check out your bulb number 

 #4 Referring to previous bulbs

If you are a bit more hands-on and are able to remove your lights yourself, you can remove the light and take a look at the bulb. The bulb will state the fitting around the casing i.e 'H11'. Take a look at this example:

H11 Halogen Bulb Size

#5 Contact Us

If you still can’t find your bulb numbers, let us do the work for you! Send email to cs@lasfit.com and tell us your year, make, model, and the position you want to replace. Our customer service will help you get the answer. 

5 Responses


February 22, 2023

I want to buy Blue LED Head Lamps bulbs for my 2019 Honda Fit. I also want 2 map lights for my interior. all LED bulbs For
a Rear Led bulb for truck as well. ASAP please.

Frank Szela

December 25, 2022

Hello, My 2022 GMC Canyon Elevation Crew Cab Long Box 4wd came with Halogen headlights. It has low and separate high beams. Can these be replaced with LED lights? What should I buy? Thanks. Frank.

Leroy Davila

January 24, 2022

Looking for a conversion from HID to LED for a 2003 Infiniti G35 coupe headlight set. Do you have this ?

Gary Homolka

January 14, 2022

What is the low beam Halogen bulb number on my 2019 Jeep Grand Cherokee?

Sachin Karki

July 06, 2021

What is the bulb for 2013 honda civic ? Low Beam

Leave a comment

Also in Lasfit Blog

How To Install LASFIT Door Sill Protectors On Tesla
How To Install LASFIT Door Sill Protectors On Tesla

by Lasfit Official September 15, 2023

Basically we're protected on the carpet. We have the door sill protector. We also have this kick pad protected now. And pretty much everywhere that you put your feet on is going to be protected by Lasfit. Everything fits perfectly and now the car actually looks newer again. So there are no scratches on our trim anymore. If you had your Tesla for a long time already, and this part is already scratched, you could probably get this door sill protector so that it looks new again. Or if you just got a new car, you could use this to protect it from getting scratched. It's good for both worlds. 

Read More
How to Install LASFIT Second Row Seats Back Cover Mats on Tesla
How to Install LASFIT Second Row Seats Back Cover Mats on Tesla

by Lasfit Official September 14, 2023

One of the main purposes to have these mats is to protect the rear seats of your car. And you know it doesn't matter if you're picking them up soil, or you're picking up plants. You want to make sure that the back of your car is covered. If something does spill onto these rear covers, they're easy to clean. All you have to do is take it out, wipe it or hose it down, and put it back in. They look great. Installation was easy. And it works 100%.
Read More
 Tesla Model Y Floor Mats
How to Install LASFIT Floor Mats on Tesla Model Y

by Lasfit Official September 13, 2023

This trunk mat is pretty cool. I actually like how it looks and actually matches the floor mats. As you can see right here. And now we have full coverage with Lasfit floor liners. The floor mat is doing its job, just fine. It fits really well and looks good overall. Just a great set of floor mats.

Read More