2010 Toyota Highlander Owners Manual - Page 521

4-3. Do-it-yourself maintenance CAUTION n Replacing light bulbs l Turn off the headlights. Do not attempt to replace the bulb immediately after turning off the headlights. The bulbs become very hot and may cause burns. l Do not touch the glass portion of the light bulb with bare hands. Hold the bulb by the plastic or metal portion. If the bulb is scratched or dropped it may blow out or crack. l Fully install light bulbs and any parts used to secure them. Failing to do so may result in heat damage, fire, or water entering the headlight unit. This may damage the headlights or cause condensation to build up on the lens. n To prevent damage or fire Make sure bulbs are fully seated and locked. 496