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

The 2004 Subaru WRX STI uses a HID-D2S 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 WRX STI?

The high beam bulb size for the 2004 Subaru WRX STI is 9005 LED.

Why are my 2004 Subaru WRX STI headlights dim?

Dim headlights on a 2004 Subaru WRX STI can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a HID-D2S LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2004 Subaru WRX STI fog light?

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

Is the 2004 Subaru WRX STI single or dual beam?

The 2004 Subaru WRX STI uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2004 Subaru WRX STI?

Yes, the 2004 Subaru WRX STI comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a HID-D2S LED LED conversion kit for the low beams.

Does the 2004 Subaru WRX STI have fog lights?

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

How do I change the headlight on a 2004 Subaru WRX STI?

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 HID-D2S 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 WRX STI?

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 HID-D2S 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 WRX STI headlights?

A pair of HID HID-D2S LED bulbs costs $50 to $150. 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 WRX STI?

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 HID-D2S LED position are available as direct plug-and-play replacements.

Fitment Guaranteed for 2004 Subaru WRX STI

What Size Bulbs Does a 2004 Subaru WRX STI Use?

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

Installation Difficulty

Easy (Plug and Play)

Est. Replacement Cost

$50 - $150 (HID System)

What Lighting System Does the 2004 Subaru WRX STI Have?

When it comes to nighttime visibility, the 2004 Subaru WRX STI relies on an arrangement of 13 specialized bulbs. It features an extensive lighting system powered by premium factory HID/Xenon technology utilizing D2S projector housings for high-intensity output.

Can You Put LED Bulbs in a 2004 Subaru WRX STI?

The 2004 Subaru WRX STI is already equipped with factory D2S HID/Xenon headlights. Since HID technology already provides exceptional brightness, we recommend staying with high-quality OEM replacement bulbs rather than attempting an LED retrofit for the primary headlights. However, the H3 LED fog lights are typically halogen and are excellent candidates for an LED upgrade to match the color temperature of your HID headlights.

2004 Subaru WRX STI Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	HID-D2S LED	Buy HID-D2S LED →
High Beam	9005 LED	Buy 9005 LED →
Fog Light	H3 LED	Buy H3 LED →
Brake Light	921 LED	Buy 921 LED →
Side Marker	168 LED	Buy 168 LED →
Turn Signal Front	7440NA LED	Buy 7440NA LED →
Turn Signal Rear	7440NA LED	Buy 7440NA LED →
Reverse Light	7440	Buy 7440 →
Dome Light	DE3175	Buy DE3175 →
License Plate	168	Buy 168 →
Map Light	DE3175	Buy DE3175 →
Parking Light	168	Buy 168 →
Trunk Light	921	Buy 921 →

Installation Guide

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Other WRX STI Years

2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005

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