Toyota Yaris Sedan 2008 Quick Reference Manual page 291

4-3. Do-it-yourself maintenance
LED high mounted stoplight (vehicles with the rear spoiler)
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If the high mounted stoplight has burnt out, have it replaced by
your Toyota dealer.
Condensation build-up on the inside of the lens
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Contact your Toyota dealer for more information in the following situations.
Temporary condensation build-up on the inside of the headlight lens does
not indicate a malfunction.
Large drops of water are built up on the inside of the lens.
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Water has built up inside the headlight.
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LED high mounted stoplight
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The high mounted stoplight consists of a number of LEDs. If any of the LEDs
burn out, take your vehicle to your Toyota dealer to have the light replaced.
CAUTION
Replacing light bulbs
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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.
To prevent damage or fire
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Make sure bulbs are fully seated and locked.
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Remove the light bulb.