Honda Civic 2021 Owner's Manual page 545

uuReplacing Light BulbsuTaillights
Taillights
Taillights are LED type. Have an authorized Honda dealer inspect and replace the
light assembly.
Rear License Plate Light
Rear license plate light is LED type. Have an authorized Honda dealer inspect and
replace the light assembly.
High-Mount Brake Light Bulb
When replacing, use the following bulb.
High-Mount Brake Light: 21 W
544
1. Open the trunk.
2. Turn the socket counter-clockwise and
remove it.
3. Remove the old bulb and insert a new bulb.
Bulb
Socket