What is the low beam headlight bulb size for a 2001 Toyota Sienna?

The 2001 Toyota Sienna uses a H4 bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 2001 Toyota Sienna?

The high beam bulb size for the 2001 Toyota Sienna is N/A.

Why are my 2001 Toyota Sienna headlights dim?

Dim headlights on a 2001 Toyota Sienna can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a H4 LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2001 Toyota Sienna fog light?

The 2001 Toyota Sienna uses a 9006 bulb for the fog light position.

Is the 2001 Toyota Sienna single or dual beam?

The 2001 Toyota Sienna uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2001 Toyota Sienna?

Yes, the 2001 Toyota Sienna comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a H4 LED conversion kit for the low beams.

Does the 2001 Toyota Sienna have fog lights?

Yes, the 2001 Toyota Sienna takes a 9006 bulb for the fog light position.

Did the 2001 Toyota Sienna change headlight bulb sizes from the previous year?

Yes — the 2001 Toyota Sienna uses different bulb sizes than the 2000 model. The 2001 generation introduced this bulb configuration.

Is the 2001 Toyota Sienna the first or last year to use H4 bulbs?

The 2001 Toyota Sienna is the only year in the 2001 generation to use the H4 bulb for the low beam headlight.

How do I change the headlight on a 2001 Toyota Sienna?

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 H4 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 2001 Toyota Sienna?

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 H4 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 2001 Toyota Sienna headlights?

A pair of halogen H4 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 2001 Toyota Sienna?

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 H4 position are available as direct plug-and-play replacements.

The 2001 Toyota Sienna has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 2001 Toyota Sienna

What Size Bulbs Does a 2001 Toyota Sienna Use?

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

Installation Difficulty

Easy (Plug and Play)

Est. Replacement Cost

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

What Lighting System Does the 2001 Toyota Sienna Have?

Owners of the 2001 Toyota Sienna will find a total of 12 lighting elements throughout the vehicle's exterior. It features an extensive lighting system powered by a dual-bulb halogen configuration using separate H4 low beam and high beam bulbs for precise light distribution. This model belongs to the early years of the Sienna's 1998-2020 production span.

Can You Put LED Bulbs in a 2001 Toyota Sienna?

For a Toyota built for the road and trail, LED upgrades provide the high-contrast lighting needed for better obstacle detection. We recommend starting your upgrade with the H4 low beams, as they see the most use. Adding a matching LED kit later will complete the look and ensure consistent lighting performance. Don't forget the 9006 fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

2001 Toyota Sienna Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	H4	Buy H4 →
Side Marker	3157CK	Buy 3157CK →
Turn Signal Front	3157CK	Buy 3157CK →
Fog Light	9006	Buy 9006 →
License Plate	168	Buy 168 →
Parking Light	3157CK	Buy 3157CK →
Reverse Light	921	Buy 921 →
Brake Light	921	Buy 921 →
Turn Signal Rear	7440NA	Buy 7440NA →
Tail Light	7443	Buy 7443 →
Dome Light	DE3423	Buy DE3423 →
Map Light	DE3175	Buy DE3175 →