2012 Toyota Avalon Owners Manual - Page 437

4-3. Do-it-yourself maintenance STEP 2 Unplug the connector pushing the lock release. while STEP 3 Exchange the light bulb, and install the socket. Align the 3 tabs on the light bulb with the mounting, and insert. STEP 4 Turn and secure the socket. After installing the socket, turn the headlight high beams on once and visually confirm that no light is leaking through the mounting. 458