What is the low beam headlight bulb size for a 2018 Toyota Tundra?

The 2018 Toyota Tundra uses a 9003 LED bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 2018 Toyota Tundra?

The high beam bulb size for the 2018 Toyota Tundra is 9003 LED.

Why are my 2018 Toyota Tundra headlights dim?

Dim headlights on a 2018 Toyota Tundra can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a 9003 LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2018 Toyota Tundra fog light?

The 2018 Toyota Tundra uses a H16 LED bulb for the fog light position.

Is the 2018 Toyota Tundra single or dual beam?

The 2018 Toyota Tundra uses a single bulb (dual filament) headlight system. This means one bulb controls both high and low beams.

Can I install LED bulbs on my 2018 Toyota Tundra?

Yes, the 2018 Toyota Tundra comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a 9003 LED LED conversion kit for the low beams.

Does the 2018 Toyota Tundra have fog lights?

Yes, the 2018 Toyota Tundra takes a H16 LED bulb for the fog light position.

Did the 2018 Toyota Tundra change headlight bulb sizes from the previous year?

No — the 2018 Toyota Tundra uses the same bulb sizes as the 2017 model. This configuration has been consistent across the 2016–2021 generation.

How do I change the headlight on a 2018 Toyota Tundra?

Turn off the vehicle and open the hood. Locate the headlight assembly from behind, remove the dust cover or retaining clip, disconnect the wiring harness, twist the old 9003 LED bulb counter-clockwise to remove it, then insert the new bulb and reassemble. The whole process typically takes 10 to 30 minutes per side depending on accessibility.

Are LED headlights legal for a 2018 Toyota Tundra?

LED bulbs used off-road or in auxiliary lights are legal everywhere. For on-road headlight use, legality varies by state. Many states allow LED retrofits as long as the beam pattern meets DOT standards. For the best legal compliance, choose a DOT-approved 9003 LED LED kit that is designed as a direct replacement and produces a proper cutoff pattern without excessive glare.

How much does it cost to replace 2018 Toyota Tundra headlights?

A pair of halogen 9003 LED bulbs costs $15 to $40, while LED conversion kits run $25 to $60 per pair. If you have a shop do the work, expect an additional $20 to $50 in labor per bulb. Replacing them yourself at home saves the labor cost and usually takes under 30 minutes.

What is the difference between halogen and LED for a 2018 Toyota Tundra?

Halogen bulbs produce a warm yellow light (around 3200K), last 500 to 1000 hours, and draw more power. LED bulbs emit a brighter white light (5000-6000K), last 25,000+ hours, and use less energy. LED upgrades for the 9003 LED position are available as direct plug-and-play replacements.

The 2018 Toyota Tundra shares its bulb sizes with the 2016–2021 generation.

Fitment Guaranteed for 2018 Toyota Tundra

What Size Bulbs Does a 2018 Toyota Tundra Use?

Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.

Installation Difficulty

Moderate (Dust covers often present)

Est. Replacement Cost

$15 - $40 (Halogen) / $30+ (LED)

What Lighting System Does the 2018 Toyota Tundra Have?

When it comes to nighttime visibility, the 2018 Toyota Tundra relies on an arrangement of 14 specialized bulbs. It features an extensive lighting system powered by a halogen-based setup where a single 9003 LED dual-filament bulb handles both low and high beam duties within the same reflector. This model belongs to the late years of the Tundra's 2000-2021 production span.

Can You Put LED Bulbs in a 2018 Toyota Tundra?

For a Toyota built for the road and trail, LED upgrades provide the high-contrast lighting needed for better obstacle detection. Since your Tundra uses a single 9003 LED bulb for both high and low beams, ensure your chosen LED kit is "dual-beam" compatible. This allows the LED circuitry to mimic the two-filament design of the original halogen bulb. Don't forget the H16 LED fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

2018 Toyota Tundra Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	9003 LED	Buy 9003 LED →
High Beam	9003 LED	Buy 9003 LED →
Fog Light	H16 LED	Buy H16 LED →
Brake Light	921 LED	Buy 921 LED →
Side Marker	3157KX LED	Buy 3157KX LED →
Turn Signal Front	4157NA LED	Buy 4157NA LED →
Turn Signal Rear	921 LED	Buy 921 LED →
Reverse Light	7440	Buy 7440 →
Dome Light	168	Buy 168 →
License Plate	168	Buy 168 →
Map Light	168	Buy 168 →
Parking Light	4157NA	Buy 4157NA →
Trunk Light	921	Buy 921 →
Tail Light	3157	Buy 3157 →

How do the 2018 Toyota Tundra's bulbs compare to other years?

The 2018 Toyota Tundra uses the same bulbs as the 2017 model.

The 2019 model continues with the same bulb sizes.

This bulb configuration covers the 2016–2021 model years. ← 2017 2019 →

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Other Tundra Years

2021 2020 2019 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000

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