What Size Bulbs Does a 1991 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 1991 Subaru Legacy Have?
When it comes to nighttime visibility, the 1991 Subaru Legacy relies on an arrangement of 13 specialized bulbs. It features an extensive lighting system powered by a halogen-based setup where a single 9004 LED dual-filament bulb handles both low and high beam duties within the same reflector. This model belongs to the early years of the Legacy's 1990-2019 production span.
Can You Put LED Bulbs in a 1991 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 9004 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 LED Fog Light fog lights; switching these to LED can dramatically improve your visibility in adverse weather.
1991 Subaru Legacy Bulb Size Chart
| Position | Bulb Size | Shop |
|---|---|---|
| Low Beam | 9004 LED | Buy 9004 LED → |
| High Beam | 9004 LED | Buy 9004 LED → |
| Fog Light | LED Fog Light | Buy LED Fog Light → |
| Brake Light | 912 LED | Buy 912 LED → |
| Side Marker | 67 LED | Buy 67 LED → |
| Turn Signal Front | 921 LED | Buy 921 LED → |
| Turn Signal Rear | 1156 LED | Buy 1156 LED → |
| Reverse Light | 1156 | Buy 1156 → |
| Dome Light | DE3175 or 158 | Buy DE3175 or 158 → |
| License Plate | 194 | Buy 194 → |
| Map Light | DE3175 | Buy DE3175 → |
| Parking Light | 67 | Buy 67 → |
| Trunk Light | 168 | Buy 168 → |