Quick 4Runner Bulb Size Chart

 

For factory-halogen 5th-generation 4Runner applications, these are the primary bulbs you'll want to verify:

Important: The exact bulb specification should be verified against your year, trim and factory lighting configuration. Current fitment databases commonly list H11 low beam and 9005 high beam for 2014–2024 4Runner applications, while Toyota documentation identifies the factory bulb types by specific vehicle configuration.

Quick Note about Fog light sizes: Our H11 F1 Series bulbs are universal for sizes H11 and H16! 

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2014–2023 Toyota 4Runner Bulb Sizes by Year

The 5th-generation Toyota 4Runner uses a combination of halogen and, depending on configuration, other factory lighting systems.

For the common factory-halogen headlight configuration:

Low Beam

H11

High Beam

9005 / HB3

Fog Light

Verify application — H11/H16 configurations may be encountered.

Quick Note : Our H11 F1 Series bulbs are universal for sizes H11 and H16!

The high beam is particularly important when upgrading to LED because the 4Runner can use the high-beam circuit for daytime-running-light operation. This can create flickering or other electrical behavior with some LED bulbs. Fuzed's existing testing specifically identified this issue and recommends a CANBUS decoder for the high-beam application.

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2014–2016 Toyota 4Runner Bulb Sizes

The commonly listed bulb applications for 2014–2016 4Runner models include:

 

Before ordering: Verify the bulb against your specific 4Runner because Toyota offered different equipment and some aftermarket assemblies use different bulb sizes.

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2017–2019 Toyota 4Runner Bulb Sizes

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2020–2021 Toyota 4Runner Bulb Sizes

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2022–2024 Toyota 4Runner Bulb Sizes

For 2022–2024 models, current fitment guides list:

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What Bulbs Does a 5th Gen 4Runner Use?

The 5th-generation Toyota 4Runner covers a large range of model years, so it's important to identify the exact year and factory lighting configuration before purchasing replacement bulbs.

For the common factory-halogen headlight setup:

Low beam: H11
High beam: 9005/HB3

The high-beam circuit is also used for daytime-running-light operation on applicable vehicles, which is important when installing LED bulbs.

Looking for an LED upgrade?

Shop Fuzed LED's vehicle-specific 4Runner lighting options:

→ Shop 4Runner Headlight & Fog Light Upgrades

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Can I Put LED Headlight Bulbs in My 4Runner?

Yes, a factory-halogen 4Runner headlight assembly can be upgraded to LED bulbs designed for the correct bulb size.

However, not all LED bulbs perform the same way in a factory reflector or projector housing.

A good LED replacement should:

• Match the original bulb's mounting position
• Position the LED emitters correctly
• Fit inside the factory housing
• Allow the factory dust cover to be reinstalled
• Provide appropriate thermal management
• Produce a controlled beam pattern
• Work correctly with the vehicle's electrical system

The goal isn't simply to produce the highest claimed lumen number.

The goal is to put useful light on the road without creating excessive glare.

4Runner with Halogen Bulbs (Before LED Upgrade):

4Runner upgraded with Fuzed LED Headlight bulbs and Fog light bulbs:

 

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5th Gen 4Runner LED Headlight Beam Pattern

The factory 4Runner projector headlight uses a defined cutoff to control where the headlight beam goes.

When upgrading to LED, bulb design and LED-chip positioning matter.

Fuzed's testing of its F1 series on the 4Runner focuses on maintaining the factory beam pattern while increasing usable light output. The current Fuzed page includes actual installation/testing material and reports an increase in output while maintaining the cutoff.

Why does LED bulb orientation matter?

The LED emitters need to sit in the correct position relative to the factory housing.

If the bulb is rotated incorrectly, you can end up with:

• An unfocused beam
• Reduced usable light
• More scattered light
• Poor cutoff definition
• Increased glare

Always check the beam pattern after installing an LED bulb.

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Fuzed LED 4Runner LED Headlight Testing

We don't believe an LED bulb should be judged by a lumen number alone.

For the 4Runner, we pay particular attention to:

Fitment

Does the bulb properly lock into the factory housing?

Orientation

Are the LED emitters positioned correctly?

Beam pattern

Does the factory cutoff remain properly defined?

Output

How much usable light reaches the road?

Clearance

Can the factory dust cover be reinstalled?

Electrical compatibility

Does the bulb operate correctly with the 4Runner's electrical system?

Pro tip for Fuzed: Always be sure to reinstall your dust cover after replacing your headlight bulbs, if it is left off you will allow moisture and dirt into the assembly causing it to dull your output. 

 

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How to Install LED Headlight Bulbs on a 4Runner

Installing the Fuzed F1 series on a factory-halogen 4Runner is relatively straightforward.

Step 1 — Remove the factory dust cover

Access the rear of the headlight assembly and remove the factory dust cover.

Step 2 — Disconnect the factory bulb

Disconnect the electrical connector from the factory halogen bulb.

Step 3 — Remove the factory bulb

Rotate the factory bulb counterclockwise and remove it from the housing.

Step 4 — Install the Fuzed LED bulb

Line up the locking tabs on the Fuzed bulb with the slots in the factory housing.

Rotate the bulb clockwise until it locks securely into position.

Step 5 — Check bulb orientation

Make sure the bulb is fully seated and correctly oriented.

Correct orientation is important for beam pattern and output.

Step 6 — Connect the electrical connector

Connect the Fuzed LED bulb to the factory connector.

If your specific bulb has polarity-sensitive wiring, make sure the positive and negative connections are correctly oriented.

Step 7 — Test the bulb

Turn the headlights on.

If the bulb does not illuminate, disconnect the connector, reverse the connection if applicable, and test again.

Step 8 — Reinstall the dust cover

Once the bulb is operating correctly, reinstall the factory dust cover.

Fuzed's existing 4Runner installation instructions follow this basic process and include an installation video.

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Why Are My 4Runner LED Headlights Flickering?

One of the most common issues when upgrading a 4Runner to LED is high-beam flickering.

The reason is that the 4Runner can use the high-beam circuit for daytime-running-light operation. DRL operation can reduce the electrical power supplied to the bulb, and some LED bulbs may respond by flickering or failing to operate normally. Fuzed specifically documents this issue on its 4Runner testing page.

The solution

A compatible CANBUS decoder may be required for the high-beam LED application.

→ Shop Fuzed LED CANBUS Decoders

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Why Won't My 4Runner LED Bulb Turn On?

If your LED bulb is installed but doesn't illuminate:

1. Check the connector

Disconnect the bulb and reconnect it securely.

2. Check polarity

Some LED bulbs are polarity-sensitive.

Reverse the connector if the bulb does not illuminate.

3. Check the factory socket

Make sure the bulb is fully seated.

4. Check the vehicle's fuse

If the factory bulb also doesn't operate, check the relevant fuse and electrical connection.

5. Check CANBUS compatibility

If the issue occurs specifically with a DRL/high-beam circuit, a compatible decoder may be required.

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Why Won't My 4Runner LED Bulb Lock Into Place?

The factory 4Runner headlight housing can be a tight fit.

If the LED bulb won't fully lock:

1. Remove the bulb.
2. Check that the locking tabs are aligned.
3. Make sure the sealing ring isn't preventing the bulb from seating correctly.
4. Compare the LED bulb against the factory bulb.
5. Reinstall carefully without forcing the bulb.

Fuzed's existing 4Runner testing notes that the factory housing can be tight and that changing the seal may help in some installations.

Never force a bulb into the housing.

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How Do I Know If My 4Runner Has Factory Halogen or LED Headlights?

Before purchasing replacement bulbs, determine what type of factory headlight assembly your 4Runner has.

Factory halogen

These systems use replaceable halogen bulbs such as H11 and 9005 for the applicable headlight positions.

Factory LED

Some factory LED assemblies use integrated LED components rather than conventional replaceable bulbs.

Aftermarket headlights

If your 4Runner has aftermarket headlights, the bulb size may be completely different from the original factory configuration.

If you have aftermarket headlights, always verify the bulb specification supplied by the headlight manufacturer.

This distinction is important because aftermarket assemblies can use different bulb sizes from the factory configuration.

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4Runner LED Bulb Buying Guide

When choosing an LED upgrade for your 4Runner, don't choose based solely on the advertised lumen number.

Look for:

Fuzed LED F1 Series

The F1 series is designed as a direct LED upgrade for compatible factory-halogen applications.

→ Shop Fuzed F1 LED Headlight Bulbs

Fuzed LED F1 Plus

→ Shop Fuzed F1 Plus LED Headlight Bulbs

Important: Match the Fuzed bulb to your exact factory bulb size before ordering.

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4Runner Reverse Light Bulb Size

The commonly listed reverse/back-up bulb for the 5th-generation 4Runner is:

921 / T15

Some fitment guides list both 921 and T15 interchangeably for this application.

If you're upgrading your reverse lights to LED, verify the physical base and application before ordering.

Factory Reverse light bulb output:

Fuzed LED 2100 Lumen Reverse light bulb output:

→ Shop Fuzed LED Reverse Lights

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4Runner License Plate Bulb Size

The commonly listed license-plate application is:

194 / T10

Current 4Runner bulb guides list 194/T10/168 equivalents for several small exterior and interior lighting applications.

→ Shop Fuzed LED License Plate Lights

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4Runner Interior Bulb Sizes

Common interior applications include:

Exact equipment can vary by year and trim, so verify your existing bulb before ordering. Current aftermarket charts show some variation in dome/interior applications between model years.

→ Shop Fuzed 4Runner Interior LED Kit

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Frequently Asked Questions About 4Runner Bulb Sizes & LED Lighting

What size bulb is the low beam on a 4Runner?

For common factory-halogen 5th-generation 4Runner applications, the low-beam bulb is H11. Verify your specific configuration before ordering.

What size is the high beam on a 4Runner?

The common high-beam bulb is 9005/HB3.

What size fog light does a 4Runner use?

Fog-light fitment can vary by configuration. H11 is commonly listed for many 5th-generation applications, while Toyota documentation identifies H16 on certain factory configurations. Verify the bulb installed in your specific vehicle before ordering.

Can I put LED bulbs in my 4Runner?

Yes, compatible factory-halogen headlight and fog-light applications can generally be upgraded to appropriately sized LED bulbs. Proper fitment, bulb orientation, beam pattern and electrical compatibility are important.

Do 4Runner LED headlights need a CANBUS decoder?

Not every application requires one. However, the 4Runner's high-beam/DRL circuit can cause flickering with some LED bulbs. Fuzed's testing recommends a compatible CANBUS decoder for its high-beam application to address this behavior.

Why are my 4Runner LED high beams flickering?

The high beams can also operate as daytime-running lights, which changes the electrical power supplied to the bulb. Some LED bulbs may flicker under these conditions. A compatible CANBUS decoder can help with this issue.

Why won't my 4Runner LED bulb turn on?

Check the connector, polarity, bulb seating, fuse and electrical connection. If the problem occurs on a DRL/high-beam circuit, check whether a CANBUS decoder is required.

Why won't my LED bulb fit under the 4Runner dust cover?

Some LED bulbs have larger cooling components than the factory halogen bulb. Make sure the bulb is designed for the 4Runner housing and that there is sufficient clearance before reinstalling the factory dust cover.

Does bulb orientation matter?

Yes. LED emitter orientation can affect beam pattern and usable light output. Always install the bulb in the orientation recommended by the manufacturer and check the resulting beam pattern.

Are LED headlights brighter than halogen?

A properly designed LED bulb can produce more usable light than a factory halogen bulb, but advertised lumen numbers don't tell the whole story. Beam pattern, emitter placement, optics, thermal management and housing design all affect real-world performance.

What is the 5th Gen 4Runner?

The 5th-generation 4Runner is the N280 generation that began for the 2010 model year and continued through the 2024 model year. This guide focuses on the 2014–2023 model years.

Can I use this chart with aftermarket headlights?

Not necessarily. Aftermarket headlight and fog-light assemblies can use different bulb sizes. Always verify the bulb specification for the specific assembly installed on your vehicle.

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Need help finding the right 4Runner bulb?

If you're unsure which bulb your 4Runner needs, use our vehicle selector or contact Fuzed LED before ordering.

→ Find Your Vehicle

→ Contact Fuzed LED

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Shop Toyota 4Runner LED Upgrades

4Runner Headlight & Fog Light Kits

Upgrade your factory lighting with a complete Fuzed LED solution.

→ Shop 4Runner Headlight & Fog Light Kits

H11 LED Headlight Bulbs

For compatible H11 low-beam and fog-light applications.

→ Shop H11 LED Bulbs

9005 LED Headlight Bulbs

For compatible 9005/HB3 high-beam applications.

→ Shop 9005 LED Bulbs

CANBUS Decoders

Designed to help address flickering and electrical compatibility issues on applicable LED installations.

→ Shop CANBUS Decoders

4Runner Interior LED Kit

Upgrade your interior lighting with LED replacements.

→ Shop 4Runner Interior LED Kit 

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Final Fitment Reminder

Don't order a bulb based solely on the year of your 4Runner.

Verify:

• Model year
• Trim
• Factory headlight type
• Factory fog-light assembly
• Aftermarket modifications
• Existing bulb size

If you're replacing a factory bulb, comparing the markings on the existing bulb with this guide is an excellent final check.

When in doubt, contact Fuzed LED before ordering.

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About Fuzed LED

Fuzed LED specializes in automotive LED lighting, vehicle-specific fitment and LED upgrades for cars and trucks.

Our goal is simple:

Better light. Correct fitment. A properly controlled beam.