Subaru Legacy 2021 Owner's Manual page 526

520
Replacing Bulbs
2. Remove the side cover.
3. Remove the upper and lower screws.
4. Slide the rear combination light as-
sembly straight rearward and remove it
from the vehicle.
1) Rear turn signal light
5. Remove the bulb holder from the rear
combination light assembly by turning it
counterclockwise.
6. Pull the bulb out of the bulb holder and
replace it with a new one.
7. Set the bulb holder into the rear
combination light assembly and turn it
clockwise until it locks.
8. Reinstall the rear combination light
assembly by sliding the two-pronged part
of the combination light assembly securely
to each holder of the vehicle side.