
PIAA 15223 H3 Xtreme White Plus
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Used for: Fog Light Bulb Front
Used for: Fog Light Bulb Front
Used for: Headlight Bulb High Beam
Used for: Headlight Bulb High Beam and Low Beam
Used for: Headlight Bulb Low Beam
Used for: Back Up Light Bulb(Sedan)
Used for: Back Up Light Bulb(Wagon)
Used for: Brake Light Bulb(Sedan), Tail Light Bulb(Sedan)
Used for: Brake Light Bulb(Wagon), Tail Light Bulb(Wagon)
Used for: Center High Mount Stop Light Bulb
Used for: Center High Mount Stop Light Bulb(Wagon), Trunk or Cargo Area Light(Compare to original - Option 2)
Used for: License Plate Light Bulb
Used for: License Plate Light Bulb
Used for: Parking Light Bulb, Side Marker Light Bulb Front, Turn Signal Light Bulb Front(Compare to original - Option 2)
Used for: Turn Signal Light Bulb Front(Compare to original - Option 1)
Used for: Turn Signal Light Bulb Rear(Sedan)
Used for: Turn Signal Light Bulb Rear(Wagon)
Used for: Courtesy Light Bulb(Compare to original - Option 1)
Used for: Courtesy Light Bulb(Compare to original - Option 1)
Used for: Courtesy Light Bulb(Compare to original - Option 2)
Used for: Dome Light Bulb, Map Light Bulb
Used for: Trunk or Cargo Area Light
Used for: Trunk or Cargo Area Light
This page for the 2004 Subaru Legacy helps you verify the correct bulb size by lighting position, so you can match the right part before you buy. Because Legacy trim, body style, and lighting package can vary by market, it is important to confirm whether your car is a sedan or wagon and then compare the bulb location on the chart.
Use the listings below as a fitment guide for common exterior and interior lights on the 2004 Legacy. You will find bulb sizes for headlights, fog lights, parking lights, turn signals, brake lights, reverse lights, license plate lights, dome lights, map lights, courtesy lights, and cargo area lighting, which makes it easier to replace only the bulb you need.
For best results, always check the bulb already installed in your Subaru before ordering, especially if the car has been modified or if the lighting package differs from stock. Halogen bulbs and LED replacements are not always direct swaps, and some aftermarket conversions may need adapters, resistors, or different bulb bases to work correctly without warning lights or beam pattern issues. If your Legacy has been repaired in the past, the installed bulb may not match the original specification, so a quick visual check can save time and prevent returns.
The low beam headlight bulb is H1 on this page. Some versions may differ by market or lighting package, so confirm the bulb in your vehicle before purchase.
The high beam bulb is 9005 for the standard listing shown here. There is also a combined high beam and low beam listing of 9007 for some configurations, so check your exact headlight setup.
No. Trim and lighting package can vary, and some models use separate bulbs while others may use a combined headlight bulb setup. Verify the installed bulb and the headlight housing type.
The front fog light bulb is listed as H3C, H3. Either of those may apply depending on the exact fog lamp assembly.
The license plate light bulb is 168 or 917. Both are listed for this position on the 2004 Legacy.
The dome light bulb is DE3175. This is a common interior festoon-style bulb used in the overhead lamp.
The map light bulb is also DE3175. If your map lights are dim or burned out, replace both sides if they match.
For the sedan, both the brake light and tail light bulb are listed as 3157R.
For the wagon, the brake light bulb and tail light bulb are listed as 1157R.
The rear turn signal bulb for the sedan is 3157.
The rear turn signal bulb for the wagon is 7440.
The sedan back-up light bulb is 3156.
The wagon back-up light bulb is 1156.
Both the parking light bulb and the front side marker light bulb are listed as 1157A.
The center high mount stop light bulb is 921 for one listing, and 912 for the wagon listing shown here. Check the body style before ordering.
LED upgrades can work well, but fitment, polarity, beam pattern, and heat management can differ from halogen bulbs. Check the socket type, make sure the LED matches the original base, and confirm that the light output is legal and suitable for road use.