In short, bulb sizes on the 2020 Toyota Tundra vary by lighting setup and trim. Halogen headlight systems typically use H11 low-beam bulbs and 9005 high-beam bulbs, while many trims with LED headlights use integrated modules with no bulb to replace. Fog lights are usually H11 in halogen configurations, with some trims using alternate sizes. Always verify your exact bulbs with the owner's manual or the sticker on the driver's door jamb.
The 2020 Tundra offers multiple lighting configurations, and what you need depends on whether your truck uses halogen or LED headlights, plus which trim level you have and whether it includes fog lights. Below is a guide to what you’re most likely to encounter and how to confirm for your specific vehicle.
Headlights: Halogen configurations
For trucks equipped with halogen headlights, the replacement bulb sizes are typically determined by whether you need low-beam or high-beam bulbs.
- Low-beam bulb: H11
- High-beam bulb: 9005 (often labeled HB3)
These sizes are common on base and mid-level trims that retain halogen headlamps. If your 2020 Tundra uses LED headlights, the above does not apply to the main headlights.
Headlights: LED configurations
On models with LED headlights, there isn't a separate replaceable bulb for the main headlight assembly. If an LED module or related component fails, replacement is handled as a headlamp unit service item through Toyota or a qualified technician.
Fog lights
Fog light bulb sizes on halogen-equipped 2020 Tundra models are usually the same as headlight bulbs, but some trims use alternate sizes depending on the fog lamp design. The typical expectation is:
- Fog light bulb: commonly H11
- Alternative sizes: 9005 or 9006 may be used on certain trims or fog assemblies
Because fog light assemblies vary by trim and market, verify the exact size for your vehicle before purchasing replacements.
How to verify the exact bulb size for your Tundra
To be certain you get the right bulb, check the owner's manual's bulb replacement section, look at the sticker near the driver's door jamb that lists bulb sizes, or remove the existing bulb and read the part number and size printed on the base. For LEDs, consult the dealer for replacement options rather than attempting to swap in a halogen bulb.
Summary
The 2020 Toyota Tundra presents multiple lighting configurations that depend on trim and options. Halogen headlights typically use H11 for low beams and 9005 for high beams, with fog lights commonly H11. LED headlamps generally use non-replaceable LED modules rather than bulbs. Always verify the exact sizes on your specific vehicle via the owner's manual or door jamb sticker, and consult a Toyota dealer or trusted mechanic if in doubt.