What is the low beam headlight bulb size for a 2021 Lexus IS300?

The 2021 Lexus IS300 uses a N/A bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 2021 Lexus IS300?

The high beam bulb size for the 2021 Lexus IS300 is N/A.

Why are my 2021 Lexus IS300 headlights dim?

Dim headlights on a 2021 Lexus IS300 can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a N/A LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2021 Lexus IS300 fog light?

The 2021 Lexus IS300 typically does not come with factory fog lights in all trim levels. If your vehicle is equipped with them, check the manual as sizes can vary by trim.

Is the 2021 Lexus IS300 single or dual beam?

The 2021 Lexus IS300 uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2021 Lexus IS300?

Yes, the 2021 Lexus IS300 comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a N/A LED conversion kit for the low beams.

Did the 2021 Lexus IS300 change headlight bulb sizes from the previous year?

Yes — the 2021 Lexus IS300 uses different bulb sizes than the 2019 model. The 2021 generation introduced this bulb configuration.

Is the 2021 Lexus IS300 the first or last year to use N/A bulbs?

The 2021 Lexus IS300 is the only year in the 2021 generation to use the N/A bulb for the low beam headlight.

How do I change the headlight on a 2021 Lexus IS300?

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 N/A 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 2021 Lexus IS300?

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 N/A 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 2021 Lexus IS300 headlights?

A pair of halogen N/A 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 2021 Lexus IS300?

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 N/A position are available as direct plug-and-play replacements.

The 2021 Lexus IS300 has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 2021 Lexus IS300

What Size Bulbs Does a 2021 Lexus IS300 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 2021 Lexus IS300 Have?

Owners of the 2021 Lexus IS300 will find a total of 5 lighting elements throughout the vehicle's exterior. It features a standard lighting system powered by a dual-bulb halogen configuration using separate low beam and high beam bulbs for precise light distribution. This model belongs to the late years of the IS300's 2001-2022 production span.

Can You Put LED Bulbs in a 2021 Lexus IS300?

Upgrading to LED is one of the most effective ways to modernize your Lexus's appearance and safety profile. We recommend starting your upgrade with the low beams, as they see the most use. Adding a matching LED kit later will complete the look and ensure consistent lighting performance.

2021 Lexus IS300 Bulb Size Chart

Position	Bulb Size	Shop
Reverse Light	3057	Buy 3057 →
Brake Light	3057	Buy 3057 →
Side Marker	3057	Buy 3057 →
Turn Signal Rear	3057	Buy 3057 →
Tail Light	3057	Buy 3057 →

How do the 2021 Lexus IS300's bulbs compare to other years?

The 2021 Lexus IS300 changed bulb sizes from 2019. The previous model year used a different configuration.

The 2022 model switched to a different bulb configuration.

This bulb configuration covers the 2021 model years. ← 2019 2022 →

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Other IS300 Years

2022 2019 2018 2017 2016 2005 2004 2003 2002 2001