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2018 Toyota Tundra Bulb Size Chart

Bulb sizes may vary by trim, factory lighting package, region, production date, and previous modifications. Verify the bulb number on your existing bulb before buying.

Last database update: May 2026. Manual review status: Not yet manually reviewed.

Verify before buying: check the bulb number printed on your existing bulb, confirm your trim and factory lighting package, and review the seller's fitment notes.
Disclosure: We may earn a commission from links marked Affiliate. Unmarked retailer links may be plain search links. Always verify bulb fitment before purchasing.

2018 Toyota Tundra Bulb Size Chart

PositionBulb CodeAliasesTrim / PackageFactory TypeConfidenceReviewNotesShop
Low Beam9003HB2 / H4Standard listingHalogenHigh
Pending

Dual-beam bulb; verify factory housing and lighting package.

AmazoneBay
High Beam9003HB2 / H4Standard listingHalogenHigh
Pending

Dual-beam bulb; verify factory housing and lighting package.

AmazoneBay
Fog LightH11H8 / H9 / H16If equipped / package-dependentHalogenHigh
Pending

If equipped; fog light packages can vary by trim.

AmazoneBay
Brake Light921—Standard listingHalogenHigh
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Side Marker3157KX—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Turn Signal Front4157NA—Standard listingHalogenHigh
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Turn Signal Rear921—Standard listingHalogenHigh
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Reverse Light7440—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Dome Light168—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
License Plate168—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Map Light168—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Parking Light4157NA—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Trunk Light921—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Tail Light3157—Standard listingHalogenHigh
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon

2018 Toyota Tundra Fitment Notes

Across the 2000-2021 production range, our database shows changes in the listed Low Beam, High Beam, Fog Light positions. Use the chart above for this 2018 model, then confirm the bulb number in your vehicle before buying.

Known fitment limitations

  • factory HID or LED packages may use different parts
  • fog lights may depend on equipment package
  • aftermarket headlight assemblies may use different bulbs
  • regional models and production-date splits may differ

See an incorrect bulb size? Submit a correction.

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 →

Finding the best installation guide...

Other Tundra Years

202120202019201720162015201420132012201120102009200820072006200520042003200220012000

More from Toyota

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Other Vehicles That Use 9003 / HB2 / H4 Bulbs

2023 Hyundai Venue2023 Kia Rio2022 Hyundai Accent2020 Ford Figo2020 Honda Fit2020 MINI Cooper

Frequently Asked Questions

Our database lists 9003 for the 2018 Toyota Tundra low beam headlights. Verify the bulb number on your existing bulb and confirm your trim or factory lighting package before buying.

Our database lists 9003 for the 2018 Toyota Tundra high beam position. Some vehicles vary by trim, lighting package, or previous housing changes.

Dim headlights on a 2018 Toyota Tundra can come from aging halogen bulbs, cloudy lenses, weak electrical connections, or an incorrect bulb. Confirm the listed 9003 size against the bulb in the housing before choosing a replacement or upgrade.

Our database lists H11 for the 2018 Toyota Tundra fog light position. Fog lights are often package-dependent, so verify that your vehicle is equipped with factory fog lights before ordering.

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

LED upgrades are available for many 9003 applications, but fitment, beam pattern, dashboard warnings, and road-use legality can vary. Use products that list your exact bulb family, such as 9003 / HB2 / H4, and verify the factory housing before buying.

Our database has a fog light entry for the 2018 Toyota Tundra: H11. Fog lights may still depend on trim or equipment package.

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

Access varies by engine bay layout and headlight housing. Before disassembly, confirm the listed 9003 low beam size on the existing bulb or owner's manual, then follow the service procedure for your exact trim.

Rules for LED headlight retrofits vary by location and by housing type. Avoid products that create glare or lack road-use compliance claims, and check local requirements before using an LED conversion on public roads.

Replacement cost depends on bulb technology, brand, and labor access. Common halogen 9003 replacements are usually cheaper than LED conversion kits. Check seller fitment notes before comparing prices.

Halogen bulbs and LED replacements differ in output, heat behavior, beam pattern, and electronics. A correct bulb code does not guarantee a correct LED beam pattern, so verify physical fit and seller compatibility notes for the 2018 Toyota Tundra.