For the 2013 Subaru Legacy, the supplied fitment data lists a 9005 bulb for the high beam. No low-beam bulb is specified, so confirm the low-beam application on the vehicle before ordering; this data does not identify a low-beam size or indicate a projector/non-projector variation.
The front and rear turn signals use 7440A bulbs. Reverse lights use 921, while the brake and tail lights use 7443R. The rear side marker is listed as 7443A, and the front side marker uses 168NA. The center stop light is identified as an integrated LED rather than a replaceable bulb.
For smaller exterior and interior applications, the license plate, parking, courtesy, interior, and trunk lights may use either 168 or 917 according to the supplied data. The dome and map lights use DE3175. Check the existing bulb and socket when two sizes are listed for the same location.