Toyota 2013 Prius Owner's Manual page 537

Front side marker lights
■
Turn the bulb base counterclockwise.
STEP 1
Vehicles with halogen headlights
Vehicles with LED headlights
STEP 2
When installing, reverse the steps listed.
STEP 3
PRIUS PHV_OM_OM47787U_(U)
4-3. Do-it-yourself maintenance
Remove the light bulb.
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