Toyota 2013 Prius Owner's Manual page 532

4-3. Do-it-yourself maintenance
Rear bulb locations
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Rear turn signal light
Replacing light bulbs
Headlight low beams (halogen headlights)
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STEP 1
508
PRIUS PHV_OM_OM47787U_(U)
Back-up light
License plate lights
Turn the bulb base counterclock-
wise.