The typical replacement bulbs are H11 for the low beams and 9005 for the high beams on most 2010 Legacy models with standard halogen headlights. If your car is equipped with factory HID headlights, the bulbs are D2S or D3S and are not interchangeable with halogen bulbs.
In practice, the exact bulb type depends on your Legacy’s trim level and whether it uses halogen or HID headlights. Some early-2010 Legacy models offered HID headlights as an option, while others used traditional halogen housings. To be sure, check the owner’s manual, the information label under the hood, or inspect the bulb currently installed to confirm the correct type before purchasing replacements.
Headlight configurations in the 2010 Subaru Legacy
This section outlines the common bulb types used by the 2010 Legacy depending on whether the vehicle has halogen or HID headlights. The exact bulb can vary by trim and market, so always verify on your particular car.
- Halogen headlights (most common on base and mid trims): low beam bulb is H11; high beam bulb is 9005 (HB3).
- Fog lights (if equipped) bulb type varies by trim and market; check the specific bulb on your vehicle chassis or the owner’s manual.
Conclusion: If your Legacy uses halogen headlights, you should be looking for H11 for the low beams and 9005 for the high beams. For fog lights, consult your manual or inspect the existing bulb, as the exact type can differ by trim.
HID-equipped models (factory HID headlights)
Some 2010 Legacies were equipped with factory HID headlights. In these configurations, the bulb type is not a halogen replacement and depends on the ballast system installed in the vehicle. The most common HID bulb types are D2S or D3S, and they are not interchangeable with halogen bulbs.
- HID bulb type: D2S or D3S (depends on the ballast and headlight assembly).
- Notes about replacement: HID bulbs require compatible ballast and wiring; avoid mixing with halogen bulbs, and consider professional installation if you’re uncertain.
Conclusion: If your Legacy has HID headlights, verify whether the bulb is D2S or D3S by inspecting the current bulb or the ballast label, and replace with the matching HID bulb type. If unsure, consult the dealership or the owner's manual for the exact specification for your VIN.
Summary
For most 2010 Subaru Legacy models with standard halogen headlights, replace low beams with H11 bulbs and high beams with 9005 bulbs. If your car has factory HID headlights, the bulbs are D2S or D3S and are not interchangeable with halogen bulbs. Always confirm the precise bulb type for your trim by checking the owner’s manual, the hood label, or the existing bulb, and consider professional assistance if upgrading from HID to halogen or vice versa.
Are H11 and 9005 the same bulb?
Difference between these bulbs will be the O-ring on the base. H11 on the left side will have a big pronounced O-ring on the base of the bulb versus the 9005.
What headlight bulb do I need for a 2010 Subaru Legacy?
Sylvania – H11 SilverStar: Halogen Headlight Bulb, Brighter Downroad and Whiter Light, 1 Pack (Part No. H11ST. BP)
What kind of headlights does a Subaru have?
Subaru bulbs are available as halogen, LED, or Xenon bulbs. Halogen lights are long-lasting with a standard amount of light and a warmer color.
Do I need H11 or 9005?
H11 bulbs are designed for use as low beam headlights, while 9005 bulbs are typically used for high beams. This results in a higher brightness level for the 9005 bulbs compared to the H11 bulbs.