For the 2015 Subaru Outback, the high-beam bulb is 9005. Low-beam fitment depends on the headlight type: models with halogen headlights use H11, while models with HID headlights use D4S. Verify the headlight configuration before ordering.
Fog-light fitment is listed as either H11 LED or H16 LED. The front and rear turn signals use 7440A bulbs, and the reverse lights use 921. The daytime-running light also uses 9005.
Several exterior lights are listed as LED, including the brake, center stop, parking, and tail lights. License-plate and interior applications may use 168 or 917 bulbs. The dome and map lights use DE3175, while the trunk light uses 912. Front and rear side markers use 168NA.