What is the low beam headlight bulb size for a 2003 Toyota 4Runner?

The 2003 Toyota 4Runner uses a 9006 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 2003 Toyota 4Runner?

The high beam bulb size for the 2003 Toyota 4Runner is 9005 LED.

Why are my 2003 Toyota 4Runner headlights dim?

Dim headlights on a 2003 Toyota 4Runner can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a 9006 LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2003 Toyota 4Runner fog light?

The 2003 Toyota 4Runner uses a 9006 LED bulb for the fog light position.

Is the 2003 Toyota 4Runner single or dual beam?

The 2003 Toyota 4Runner uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2003 Toyota 4Runner?

Yes, the 2003 Toyota 4Runner comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a 9006 LED LED conversion kit for the low beams.

Does the 2003 Toyota 4Runner have fog lights?

Yes, the 2003 Toyota 4Runner takes a 9006 LED bulb for the fog light position.

Did the 2003 Toyota 4Runner change headlight bulb sizes from the previous year?

Yes — the 2003 Toyota 4Runner uses different bulb sizes than the 2002 model. The 2003–2005 generation introduced this bulb configuration.

Is the 2003 Toyota 4Runner the first or last year to use 9006 LED bulbs?

The 2003 Toyota 4Runner is the first year in the 2003–2005 generation to use the 9006 LED bulb for the low beam headlight.

How do I change the headlight on a 2003 Toyota 4Runner?

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 9006 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 2003 Toyota 4Runner?

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 9006 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 2003 Toyota 4Runner headlights?

A pair of halogen 9006 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 2003 Toyota 4Runner?

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 9006 LED position are available as direct plug-and-play replacements.

The 2003 Toyota 4Runner is the first model year to use this bulb configuration (2003–2005).

Fitment Guaranteed for 2003 Toyota 4Runner

What Size Bulbs Does a 2003 Toyota 4Runner 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 2003 Toyota 4Runner Have?

When it comes to nighttime visibility, the 2003 Toyota 4Runner relies on an arrangement of 16 specialized bulbs. It features an extensive lighting system powered by a dual-bulb halogen configuration using separate 9006 LED low beam and 9005 LED high beam bulbs for precise light distribution. This model belongs to the mid years of the 4Runner's 1984-2023 production span.

Can You Put LED Bulbs in a 2003 Toyota 4Runner?

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 9006 LED low beams, as they see the most use. Adding a matching 9005 LED LED kit later will complete the look and ensure consistent lighting performance. Don't forget the 9006 LED fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

2003 Toyota 4Runner Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	9006 LED	Buy 9006 LED →
High Beam	9005 LED	Buy 9005 LED →
Fog Light	9006 LED	Buy 9006 LED →
Brake Light	921 LED	Buy 921 LED →
Side Marker	7443 LED	Buy 7443 LED →
Turn Signal Front	7440NA LED	Buy 7440NA LED →
Turn Signal Rear	7440NA LED	Buy 7440NA LED →
Reverse Light	921	Buy 921 →
Dome Light	DE3175	Buy DE3175 →
License Plate	168	Buy 168 →
Map Light	168	Buy 168 →
Parking Light	168	Buy 168 →
Trunk Light	DE3175	Buy DE3175 →
Daytime Running	3157CK	Buy 3157CK →
Tail Light	7443CK	Buy 7443CK →
Door Light	194	Buy 194 →

How do the 2003 Toyota 4Runner's bulbs compare to other years?

The 2003 Toyota 4Runner changed bulb sizes from 2002. The previous model year used a different configuration.

The 2004 model continues with the same bulb sizes.

This bulb configuration covers the 2003–2005 model years. ← 2002 2004 →

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Other 4Runner Years

2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984

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