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When it comes to upgrading or replacing your car’s headlight bulbs, knowing your headlight bulb socket type is crucial. With so many bulb models like: H4, H7, H11, 9005, 9006 and 9012, you may often get confused.
Each socket type fits a specific bulb design and vehicle model, and using the wrong one can lead to poor lighting or installation issues.
UN Regulation 37 outlines how different types of automotive bulbs should be used. It divides them into three groups. Group 1 bulbs are approved for all uses—including headlights and tail lights. Group 2 bulbs are limited to signal functions like turn signals or brake lights and can’t be used to light up the road.
All the bulb types mentioned in this guide—H1, H3, H4, H7, H11, HB3, and HB4—fall under Group 1 and are suitable for general vehicle lighting.
Categoría | Imagen | Filamento | Cap | Nominal power | Other approvals | Common Used | Example Vehicles |
H1 |  | 1 | P14,5s | 6V&12V: 55W 24V: 70W | USA, Japan | Luz de carretera | Korean cars, German cars, American cars |
H4 |  | 2 | P43t | 6V&12V: 60W/55W 24V: 70W | Japón | Combines high and low beam in one bulb | Toyota Corolla (older), Suzuki Swift, Honda Civic (older) |
H7 |  | 1 | PX26d | 12V: 55W 24V: 70W | USA, Japan | Low or high beam | Common in Euro cars, separate Hi/Lo bulbs |
H8/H9/H11 |  | 1 | PGJ19-2 | 12V: 55W 24V: 70W | USA | Low beam or fog light | Toyota Camry, Honda Accord, Subaru Outback |
9005 (HB3) |  | 1 | P20d (90°) | 65W | N/A | High beam or DRL | Japanese cars, Emgrand, Roewe, 2018 Buick Excelle |
9006 (HB4) |  | 1 | P22d (90°) | 55W | N/A | Low beam | Japanese cars |
9012 (HIR2) |  | 1 | PX22d | 12V: 55W | USA, Japan | Low beam (projector/fog) | Chrysler 200, Dodge Dart, Jeep Cherokee |
H15 |  | 2 | PGJ23t-1 | 12V: 55 / 15W 24 V: 60 / 20W | USA | High beam + Daytime Running Light (DRL) | Volkswagen Golf MK7, BMW F30, Audi Q5 |
Car Headlight Bulb Socket Type Identification
Automotive headlight bulbs include high beam, low beam, fog lights and turn signal lights. There are many types of headlight bulbs, mainly categorized into H and D series, which can be distinguished according to base design and number of locking tabs.
Common Halogen Bulb Socket Identification:
Despite the rise of LED technology, many vehicles still come with OEM halogen bulbs. The most common types include H1, H4, H7, H11, 9005 (HB3), 9006 (HB4), 9012 (HIR2) and H15.
Over 98% of vehicles on the market use the 8 headlight bulb types mentioned above. Other models, such as HIR1 (9011), H13, 9004-9007, and H3, are rarely used.
What is H1 Bulb
The H1 headlight bulb features a single power plug and is one of the most commonly used bulbs for high beams in 12V and 24V vehicles, including trucks, SUVs, and more. It’s also used in the low beam of certain vehicle models.
👉Leer más: H1 vs H3 bulb, what is the different?
What is H4 Bulb
H4 bulbs are commonly used in headlights and feature two filaments, allowing them to function as both high and low beams in a single bulb. If your car uses H4, you only need one set of bulbs to achieve both lighting functions.
What makes H4 unique is its three-pronged connector, unlike bulbs like H1 or H7, which have one or two prongs. This distinctive design makes H4 bulbs easier to identify.
What is H7 Bulb
The H7 LED headlight bulb is easily recognized by its two-pronged plug and single-beam design, meaning separate bulbs are needed for high and low beams. It’s commonly used as the low beam bulb in many German, Korean, European, and Chinese vehicles. Since 2013, most Volkswagen models have adopted H7 bulbs for both high and low beams.
H4 and H7 bulbs may look quite similar at first glance, which often confuses drivers, but they’re actually different in several key ways, including their base design, application, and performance. Want to know the full story?
👉Click here to learn more: H4 vs H7 Bulb: What's The Difference?
What is H11 Bulb
The H11 is a single-filament halogen bulb with an L-shaped base, commonly used for low beam headlights. It’s also found in some vehicles’ fog lights and daytime running lights. H11 LED headlights are commonly found in Volkswagen, Skoda, Kia, etc.
Many drivers assume H8, H9, and H11 bulbs are interchangeable because they’re all L-shaped and share a similar size. But is that really true? While they may look alike, there are key differences in wattage, brightness, and application that you should know. Curious about whether you can actually swap them?
👉Click here to find out: H11 vs. H9 vs. H8, What’s the difference?
What is 9005 (HB3) Bulb
A 9005 bulb is typically used for high beams. It’s a single-beam bulb, which means it has one function: to provide high-intensity light for long-range visibility. Its design is optimized to project light forward, making it an excellent choice for rural or poorly lit conditions.
9005 is commonly found in high beams of Japanese and American cars, such as Mazda, Honda, Cadillac, etc.
What is 9006 (HB4) Bulb
En 9006 bulb is commonly used for low beams in models like the Toyota Corolla, older Highlander versions, and the Honda Civic. Since 2013, it has mainly been used for fog lights in vehicles such as the new Santana and new Jetta.
9005 and 9006 bulbs often confuse drivers because they look almost identical in shape. But don’t be fooled—they differ in wattage, brightness, and usage. One is typically used for high beams, while the other is designed for low beams. Want to know which one fits your car?
👉Click here to explore the differences: 9005 vs 9006, what'¿Cuál es la diferencia?
What is 9012 (HIR2) Bulb
En 9012 bulb has a PX22d base, slightly different from the 9006, and runs at 12V 55W. While it’s typically used for low beams like the 9006, some vehicles use it for both high and low beams.
For example, the 9012 functions as both high and low beam headlight in the 2012–2014 Ford Edge, 2014–2015 GMC Sierra 1500, 2015 Jeep Cherokee, and 2016–2018 Toyota RAV4. In contrast, it’s used only as a low beam in 2013–2015 Ram 1500, 2500, and 3500 models.
What is H15 Bulb
H15 bulbs are a type of halogen bulb used in automotive lighting. They are unique in having dual filaments, which allow them to serve two functions: one filament for the high beam and another for daytime running lights (DRLs).
Common HID Bulb (D Series) Identification:
The model of a xenon HID bulb is usually represented by three characters in the format “D*X,” such as “D1S” or “D2S.”
“D” stands for xenon lamp (Discharge).
The number (1, 2, 3, or 4) indicates:
- Odd numbers (1, 3): bulb includes an igniter.
- Even numbers (2, 4): bulb does not include an igniter.
- 1 and 2 contain mercury.
- 3 and 4 are mercury-free, designed to be environmentally friendly.
The letter (“S” or “R”) specifies the application:
- S: clear glass tube, used in projector lenses.
- R: coated glass, used in reflector housings to reduce glare.
Example:
D1S means a mercury-containing xenon bulb with an igniter, designed for use in projector lens setups.
Although D3 and D4 look physically the same as D1 and D2, the base notches are different. Due to their eco-friendly mercury-free design, they also operate at different voltages:
- D1 and D2 operate at 85V.
- D3 and D4 operate at 45V.
They are not interchangeable.
👉Leer más: ¿Cómo identificar fácilmente las bombillas de xenón HID D1 D2 D3 D4?
What Bulbs Do I Need for My Car?
Wondering what bulbs your car needs? It’s a common situation—eventually, every vehicle owner faces the task of replacing headlight bulbs.
This can feel overwhelming, especially if you’re not deeply familiar with cars.
Because each vehicle requires a specific bulb type, size, and fitting based on its make, model, and year, there are many factors to consider when searching for the right replacement.
Here are two simple ways to find your bulb model types.
1. Using the online bulb tool to find the right bulbs for you
Finding the correct headlight bulb for your vehicle can be made quick and easy with an online bulb finder tool. These tools allow you to input key details about your car—such as the make, model, and year—and instantly get a list of compatible bulb types and specifications.
Most bulb finder tools are free and accessible from your computer or smartphone. Simply enter your vehicle details, and the tool will do the rest.
Here are some popular and reliable bulb finder tools you can try:
2. Contact Your Vehicles Manufacturer or Check the User Manual
You can check your vehicle manual for the correct bulb type—it usually lists all the bulb fittings needed for each light. Another option is to contact your car manufacturer for the details.
If you’re comfortable doing a quick check yourself, just remove the headlight and look at the bulb directly. You’ll often find the fitting code printed on the bulb itself, like “H7” or “9005.” Here’s an example to help you spot it easily:
What is Dual Beam and Single Beam mean to headlight bulb
Most of the confusion surrounding headlights is the difference between single-beam bulbs and dual-beam bulbs.
Single beam headlight bulbs have one filament or light source, meaning they produce luz de cruce o de carretera, but not both. Common examples include H7, H11, 9005, and 9006.
Dual beam headlight bulbs have two filaments or a built-in mechanism that allows one bulb to provide both low beam and high beam. A popular example is the H4 bulb.
👉También leer: Dual Beam Vs Single Beam: What’s The Difference?
Single Beam Bulb | Dual Beam Bulb | |
|---|---|---|
Functions | One bulb = One beam mode | One bulb = Two beam modes |
Beam Modes | Either Low or High | Both Low and High |
Ejemplos | H7, H11, 9005, 9006, H1, H3 | H4, H13, 9004, 9007 |
What Cars Use H4 Headlight Bulbs?
Japanese Brands:
1997–2005 Toyota Hilux
1984–1999 Toyota Land Cruiser 70 Series
1992–2000 Honda Civic
1983–1991 Honda CR-X
1993–2000 Subaru Impreza GC/GM
1989–1998 Subaru Legacy
European Brands：
1983–1992 Volkswagen Golf Mk2
1998–2010 Volkswagen Beetle
1974–1993 Volvo 240 Series
1983–2016 Land Rover Defender
American & Others:
1997–2006 Jeep Wrangler TJ
1984–2001 Jeep Cherokee XJ
Pre-2014 Harley-Davidson Touring Models
BMW R-series Classics
What Cars Use H7 Headlight Bulbs?
Brand | Compatible Models (Years) |
|---|---|
Audi | A3 (2003-2013), A4 (2001-2008), A6 (2004-2011), TT (1999-2006), Q3 (2012-2018), Q5 (2008-2017) |
BMW | 1 Series (2004-2013), 3 Series (1998-2012), 5 Series (1996-2010), X1 (2009-2015), X3 (2003-2010) |
Mercedes-Benz | C-Class (2000-2014), E-Class (1995-2010), GLA (2013-2019), GLC (2015-2020) |
Volkswagen | Golf (1997-2012), Jetta (1999-2014), Passat (1996-2010), Tiguan (2007-2016), Polo (2002-2014) |
Volvo | S40 (2000-2012), S60 (2000-2010), V50 (2004-2012), XC60 (2008-2017) |
Hyundai | Elantra (2007-2012), Sonata (2005-2014), Tucson (2005-2015), Santa Fe (2006-2012) |
Kia | Sportage (2005-2015), Sorento (2003-2015), Optima (2006-2015), Rio (2005-2011) |
Toyota | Corolla (2002-2013), Camry (2000-2012, international models), Yaris (2005-2011), RAV4 (2006-2012) |
Subaru | Impreza (2002-2011), Forester (2002-2013), Legacy (2000-2009), Outback (2000-2009) |
Peugeot | 206 (1998-2012), 307 (2001-2008), 407 (2004-2011), 508 (2011-2018) |
Renault | Clio (1998-2012), Megane (2002-2016), Scenic (1999-2013), Laguna (2001-2015) |
Ford (EU Models) | Focus (1998-2011), Mondeo (1996-2010), Fiesta (2002-2017), Kuga (2008-2013) |
For a complete list of vehicles and their compatible headlight bulb types, download the full PDF below.👇
How To Install H4 LED Headlight Bulb?
Step 1: Open the hood and locate the back of the headlight housing.
Step 2: Unplug the wiring harness and remove the rubber dust cover (if present).
Step 3: Release the metal clip and take out the old H4 halogen bulb.
Step 4: Insert the new H4 LED bulb into the same slot and secure it with the clip.
Step 5: Reconnect the plug, test the light, and close the hood.
👉También leer: How To Install H4 Headlight Bulb | 5 Simple Step
How To Install H7 LED Headlight Bulb?
Step 1: Open the Hood and Access the Headlight
Make sure the car is off and the lights are cool. Open the hood and locate the back of the headlight. Remove the dust cover (pull it off or unscrew if needed).
Step 2: Unplug the Old Bulb
Disconnect the two-pin power plug from the old halogen bulb. Be gentle to avoid damaging the wires.
Step 3: Remove the Halogen Bulb
Release the metal clip or locking tab and pull out the halogen bulb. Avoid touching the glass if you’re handling it.
Step 4: Install the H7 LED Bulb
Insert the new LED bulb into the socket, aligning the tabs properly. Secure it with the clip. If the bulb has a driver or heat sink, make sure it fits inside the housing.
Step 5: Plug In and Test
Reconnect the power plug. Turn on the headlights to check if the LED works and the beam pattern looks good.
👉También leer: How To Install H7 Headlight Bulb | Simple Guide
Is LED Headlight Bulb Fit My Original Car Headlight?
Yes—in most cases, LED headlight bulbs can fit your original car headlight without any special tools or modifications. The good news is that many LED bulbs today are designed for plug-and-play installation, which means they are made to match the size, shape, and socket type of your original halogen bulb. You simply remove the old bulb and install the new LED one—quick and easy.
NAOEVO offers a wide range of bombillas LED de alta calidad para faros specifically designed to fit your OEM halogen sockets, ensuring compatibility, easy installation, and optimal lighting performance.
However, before buying, there are a few things you should focus on:
- Check your car’s bulb socket type- common ones include H4, H7, H11, and 9005.
- Make sure the LED bulb size fits within your headlight housing, especially if it has a built-in fan or large heat sink.
- It’s also important to choose an LED bulb with a haz de luz estándarsimilar to halogen, so you don’t create dark spots or glare.
In short, yes—LED bulbs are compatible with most vehicles. Just make sure to choose the right size, check space, and verify beam quality before upgrading. If you want to know how to choose a right LED car lights, click here to explore more: What Makes A Good LED Headlight Bulb: 8 Features to look for.
Palabras finales
Understanding headlight bulb socket types is the first step toward upgrading or replacing your car’s lighting safely and effectively. From H1 to H11, 9005 to 9012, each socket type has its unique design, fitment, and use case. Whether you’re looking to improve visibility, upgrade to LED, or just find the right replacement bulb, knowing your socket type will save you time, money, and frustration. If you’re ever unsure, always check your vehicle’s manual or use a trusted bulb compatibility guide. And remember — the right fit makes all the difference in both performance and safety.
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