To replace the front side marker light on a 2003 Toyota Highlander, first, locate the marker light assembly on the front fender. Use a flathead screwdriver to gently pry out the light assembly from its housing. Once removed, twist the bulb socket counterclockwise to release the bulb, replace it with a new bulb, and then reassemble the socket and light assembly back into the fender. Finally, test the new bulb to ensure it’s working properly.
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