What is the low beam headlight bulb size for a 2004 Subaru Legacy?

The 2004 Subaru Legacy uses a 9007 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 2004 Subaru Legacy?

The high beam bulb size for the 2004 Subaru Legacy is 9007 LED.

Why are my 2004 Subaru Legacy headlights dim?

Dim headlights on a 2004 Subaru Legacy can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a 9007 LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2004 Subaru Legacy fog light?

The 2004 Subaru Legacy uses a H3 LED bulb for the fog light position.

Is the 2004 Subaru Legacy single or dual beam?

The 2004 Subaru Legacy uses a single bulb (dual filament) headlight system. This means one bulb controls both high and low beams.

Can I install LED bulbs on my 2004 Subaru Legacy?

Yes, the 2004 Subaru Legacy comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a 9007 LED LED conversion kit for the low beams.

Does the 2004 Subaru Legacy have fog lights?

Yes, the 2004 Subaru Legacy takes a H3 LED bulb for the fog light position.

Did the 2004 Subaru Legacy change headlight bulb sizes from the previous year?

No — the 2004 Subaru Legacy uses the same bulb sizes as the 2003 model. This configuration has been consistent across the 2003–2004 generation.

Is the 2004 Subaru Legacy the first or last year to use 9007 LED bulbs?

The 2004 Subaru Legacy is the last year in the 2003–2004 generation to use the 9007 LED bulb for the low beam headlight.

How do I change the headlight on a 2004 Subaru Legacy?

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 9007 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 2004 Subaru Legacy?

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 9007 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 2004 Subaru Legacy headlights?

A pair of halogen 9007 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 2004 Subaru Legacy?

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 9007 LED position are available as direct plug-and-play replacements.

The 2004 Subaru Legacy is the last model year to use this bulb configuration (2003–2004).

Fitment Guaranteed for 2004 Subaru Legacy

What Size Bulbs Does a 2004 Subaru Legacy 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 2004 Subaru Legacy Have?

When it comes to nighttime visibility, the 2004 Subaru Legacy relies on an arrangement of 14 specialized bulbs. It features an extensive lighting system powered by a halogen-based setup where a single 9007 LED dual-filament bulb handles both low and high beam duties within the same reflector. This model belongs to the mid years of the Legacy's 1990-2022 production span.

Can You Put LED Bulbs in a 2004 Subaru Legacy?

Upgrading to LED is one of the most effective ways to modernize your Subaru's appearance and safety profile. Since your Legacy uses a single 9007 LED bulb for both high and low beams, ensure your chosen LED kit is "dual-beam" compatible. This allows the LED circuitry to mimic the two-filament design of the original halogen bulb. Don't forget the H3 LED fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

2004 Subaru Legacy Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	9007 LED	Buy 9007 LED →
High Beam	9007 LED	Buy 9007 LED →
Fog Light	H3 LED	Buy H3 LED →
Brake Light	912 LED	Buy 912 LED →
Side Marker	1157NA LED	Buy 1157NA LED →
Turn Signal Front	1157NA LED or 1156NA LED	Buy 1157NA LED or 1156NA LED →
Turn Signal Rear	7440 LED	Buy 7440 LED →
Reverse Light	1156	Buy 1156 →
Dome Light	DE3175	Buy DE3175 →
License Plate	168	Buy 168 →
Map Light	DE3175	Buy DE3175 →
Parking Light	1157NA	Buy 1157NA →
Trunk Light	2825	Buy 2825 →
Tail Light	3157CK	Buy 3157CK →

How do the 2004 Subaru Legacy's bulbs compare to other years?

The 2004 Subaru Legacy uses the same bulbs as the 2003 model.

The 2005 model switched to a different bulb configuration.

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

Finding the best installation guide...

Other Legacy Years

2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990

More from Subaru

1400 Ascent B9 Tribeca BRZ Baja Brat Crosstek Crosstrek

Other Vehicles That Use 9007 LED Bulbs

2019 Mitsubishi Mirage G4 2019 Nissan Frontier 2019 Nissan Versa Note 2015 Nissan Xterra 2014 Nissan Juke 2012 Mitsubishi Galant